毕业论文(设计)文献翻译(地质工程方面)-中英文对照

Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 0 Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression Abstract During Paleogene Neogene period multiple scale unconformities had been formed in Jiyang depression which provided favorable conditions for stratigraphic reservoirs In recent years various Paleogene Neogene stratigraphic reservoirs in Jiyang depression have been found and proved reserves were rising significantly which fully showed a great exploration potential for this kind of reservoirs But the practice of exploration in recent years indicated that the unconformities carrier system and its ability of sealing petroleum migration and its accumulation model distribution of stratigraphic reservoirs are uncertain which deeply restrict the exploration degree of stratigraphic reservoirs in Jiyang depression Based on the analysis of a large number of exploration wells and seismic data for Typical reservoirs the paper analyses unconformities construct and its effect to generation in the Paleogene Neogene and summarize the distribution pattern of stratigraphic reservoirs based on petroleum mechanism and accumulation model Finally a highly quantitative prediction modclof height of pools in stratigraphic reservoirs was established the research results effectively guided the explorationPra ctice of stratigraphic reservoir There are four macro unconformity types of Paleogene Neogene formation which including truncation overlap truncation parallel parallel overlap and paralel unconformity in Jiyang depression Besides truncation overlap unconformity lies in slopes of depression and parallel unconformity developed inside of depression another two types lie in local areas Unconformity can be developed vertically three layer structure which including unconformity roof rock weathered clay layer and semi weathered rock It also Can be two layer structure if without weathered clay layer And part of semi weather rock Can be form a hard shell accuse of its filling process during the later stage Geological characteristic of the structure layer of unconformity is different in lithology mineralogy element geochemistry and weather degree index Based on optimal partition of sequential number and principal component analysis logging quantification recognition method about unconformity structure layers were established on which effective identification of unconformitystnlcture layers can bu achieved in the case of no rock core The formation of various unconformity structure types is Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 0 related to many factors such as parent rock lithology interval of deposition hiatus palaeotopography and preservation conditions which aretogether to control spatial distributions of unconformity structure types Macro styles and its vertical structure of unconformity can be effected as a blocking reservoir trap or carrier system Blocking affection to fluid depends on weathered clay layer hard shell of semi weathered rock and mudstone So petroleum migration and accumulation units is relatively independence above and belowunconformity if structure layers mentioned above existed Reservoir affection is due to permeable rock including roof sandstone Semi weathered sandstone semi weathered carbonate rock semi weathered igneous rock and semi weathered metamorphic Trap controlling affection related to macro unconformity type and its juxtapose to permeability and impermeability rock above and below unconformity It is easy to develop stratigraphy traps where the permeability and impermeability beds juxtapose in a truncation overlap unconformity where up permeability and down impermeability in parallel overlap unconformity and down permeability and up impermeability beds juxtapose in a truncation parallel Transporting affection is owing to lateral continuity of permeable rock of unconformity In a terrestrial rift basin petroleum migration in transverse or vertical short distance in local area and is not conducive to petroleum long distance along unconformity because interbedding pattern of mudstone and sandstone is dominated and its physical property of mudstone improved poorly Because of the long distance from resource to trap migration and accumulation procese is very complicated Accumulation process of Paleogene Neogene stratigraphic traps can be summarized as following allochthonous source rock compound transportation later period charging buoyancy and pressure conversion driving for accumulation and blocking by non permeable layer of unconformity Trap types and its distribution are controlled by unconformity structure styles Petroleum distribution and its scale are controlled by generating ability of Source rock Petroleum accumulation area is decided by positive tectonic units If carrier system existed oil column of stratigraphic reservoirs is effected by four main factors which including generation expulsion quantity migrating distance dip angle and capillary resistance of carrier layer Based on the analysis of single factor the prediction model of height of oil columu through multi factor regressions was established Based on the model the paper defruited favorable areas which reserves in these areas exceed 1 5 x 1 08t Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 1 Research results of the paper combined closely with exploration practice and according to previous research results 31 exploration wells had been drilled which of them 17 wells were successfully from 2006 to 2009 There is accumulation proved reserves Was up to 2362x104t and predict reserves was to 3684x104t Keywords Paleogene Neogene unconformity stratigraphie reservoirs Fomation mechanism distribution pattern Jiyang depression Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 2 1 Preface 1 1 Foundationnd and signifacance of the topic 1 1 1 Theme origin The theme is from the Sinopcc project Forming and distribution of Tertiary stratigraphic reservoir of Jiyang depression Theme number P06012 deadline 2006 2008 1 1 2 Foundation and baekground of the theme The tectonic events frequently occurred in Jiyang depression in paleogene Neogene It was favour of forming stratigraphic reservoir because of existence of several kinds of unconformity Based on statistical data beneficial area reservoired oil is about 9500km2 and the remaining resource is about 16x 108t in stratigraphic reservoirs of paleogene Neogene stratas Since 1980s many overlap and unconformity reservoirs have been founded explored reserves Was apparently increased with deep exploring By the end of 2006 explored resource had been up to 3 7 108t which showed a large exploring potential But in fact the research on stratigraphic reservoir is lack or Uttle especially Accumulation pattern and forecasting model of oil have not been studied systematically For example the successful ratio of exploration well testing which is the lowest in allkinds reservoirs Was only 35 7 about stratigraphie reservoir in paleogene Neogene in Jiyang depression from 2001 2005 The main loss reason for the overlap andunconformity reservoirs exploration is migration and trap of oil that is separently53 5 and 23 9 Hereby oil migration problem and trap validity are importantaspects for overlap and unconformity reservoir exploring In short it has three aspects as followed 1 Shallow comprehension about conduction of ability of unconformity Research on unconformity in present indicated that it is not a simple surface three dimension body which is important for migration of oil and gas There has some deep knows about the basins in west China and the marine basins in China The systematic theory is lack about structure characteristic which deeply affect accumulating oil and gas 2 The remain uncertain migration and accumulation process of oil and gas about Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 3 stratigraphic reservoir remain uncertain Stratigraphic reservoir lay in edge of basin So it is difficult to exactly hold accumulation regular of oil and gas because far distance traps and hydrocarbon resources make a complicated migration process 3 Forecasting model of stratigraphic reservoir that could be used to guide explore is lack It is necessity to finely evaluate and explore stratigraphic reservoir along with degree of exploration Mayor controlling factors remain uncertain in construction of forecasting model of stratigraphic reservoirs 1 1 3 Aim sense and application value of theme The study resolves the problem of statigraphic reservoir formation and distribution of Paleogene Neogene in Jiyang depression By analysis of uniformity structure their affect on statigraphic reservoir formation will be identify The accumulation model will be established through study on static geologic characteristic of statigraphic reservoir Forecast mode of oil extent will be achieved through research on oil extent and to predict oil quality Research results Can not only be used to effectively guide statigraphic reservoir Exploring to raise drilling Success ratio provide technical support for increasing oil production of the Sinopec and also provide reference to statigraphic reservoir exploring of Bohai Bay area Research will enormously deepen statigraphic reservoir accumulation regular and further enrich and improve subtle reservoir exploring theory 1 2 Research present at home and abroad 1 2 1 Present research and development at home and abroad Unconformity reservoir is one of important exploring object since Levorsen proposed the concept of stratigraphic trap and then published paper on Stratigraphic oil field in 1 936 It turns into stratigraphic reservoir and lithology reservoir based on scholars deepenly research the Levorsen stratigraphic eservoir Stratigraphic trap is formed as a result of the updip reservoir directly contigence with unconformity above According to trap place accurrence and barrier stratigraphic oil pools is divided into overlap pool unconformity barbered pool and ancient buried hill pool Unconformity reservoir research covers three main sections One is unconformityand its Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 4 effect on oil accumulating The second section is developing paaem of stratigraphic trap The third is mechanism of migrating and accumulating of oil and gas Present studies mainly focus on the three sections above 1 Unconformity and its effect on oil accumulation Unconformity is geology base and key element to form the overlap and unconformity barriered traps and relevant reservoir In generally research on overlap and unconformity barrier reservoirs is first unconformity research target Oil geologists started to understand relationship between inconformity and oil and gas acumination in 1930s Levorsen published the book of geology of petroleumin 1954 The book entirely introduced definition and significance of unconformity and the relatiooships with oil accumulation The research and application of unconformity were promoted by stratigraohy and recent oil and gas accumulation theory especially the sequence stratigraohy pay a important role in predict of geological discontinuity Pan zhongxiang 2 3 referred to unconformity importance for oil and gas accumulation in 1983 Unconformity is benefit to find petroleum because it is favour of oil and gas migration and accumulation From 1990s the research on unconformity and accumulation effect were also be done in Tarim basin ordos basin Bohai bay basin and Jungar basin a important and innovation result were be achieved Fuguang 4 5 Wu kongyou l6 7 and Zhang jianlin 8 had noted that unconformity is not only a simple surface but also a special geology body a migration and accumulation passageway of oil and gas It is represent for tectonic movement sea or lake suface change and geologic alteration to earlier rocks The inhomogeneity of alteration and later overlap make the a rchitecture of unconformity There ale three layers structure in a ideal unconformity roof rock above unconformity weathered clay horizon and semi weathered rock Unconformity formation is related to denudation time climate elevation tectonic movement and lithology Two layers structure layers were formed as the weathered clay horizon was lack Liuhua 16 Suifenggui 17 etc divided unconformity into four types sand mud sand sand mud mud and mud sand According to lithologic deploy of unconformity They refcred that the migrating and accumulating ability of unconformity are decided by lithologic deploy of unconformity Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 5 Panzhongxiang 2 3 Liuxiaohant 11 Zhangkeyin 12 Chenzhonghong 14 Hedengfa Ai huaguo 19 Wuyajun 20 Chenjianping 22 23 Zhangjiguang 2l John S 26 etc had a deep research on unconformity and refered that unconformity has an apparent controlling effect on oil and gas accumulation In summery five main aspects is included charging reservoir charging trap charging migrating charging accumulating and destroying reservoir Based on physical modeling of oil migration Lv xiuzheng Bekele thought the oil migration is followed the rule migration through thin bed namely migration through prevailing passway otherwise anywhere in a conformity 2 Development regularity of stratigraphic traps Overlapped and unconformity is premise of overlap and unconformity reservoir Exiting so this kind reservoir developed based on overlapped and unconformity trap formation first Chensizhong proposed four conditions for developing overlap and unconformity reservoirs in 1982 based on research on the characteristics of overlapped and unconformity reservoirs and its distribution patterns First is that Multiple overlapped and unconformity reservoir formed as a result of Multiple unconformityies and overlaps second is that oil avvumulation area is above and below unconformity nearby hydrocarbon source rock Third is that Torque subsidence of dustpan depression cause wide rang of overlap and unconformity reservoir Fourth is that favourable overlap and unconformity reservoir lies in anti cycle litbofacies fold play Tong xiao guang referred four main controlling factors in 1983 First is time lithology attitude and weathering degree of pre Paleogene Neogene base rocks Second is structure of faulted depression and movement strength Third is overlap distribution of overlap line and feature of overlap lay above unconformity Fourth is distribution of unconformity surface permeability of overburden rocks above unconformity Hujianyi 1lreferred that unconformity is the base of forming overlap and unconformity barrier trap but not all good trap exits bearby unconformity in 1 984 and 1 986 The basic condition of forming overlap and unconformity barrier trap are six elements three lines and three surfaces Three lines are lithologic wedging line layer overlap line and intended zone contour line Three surface are Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 6 unconformity surface adjacent rock surface of reservoir and fault surface It exits kinds of trap types when six elementsarraies People deeply know development regularity of overlap and unconformity trap with sequence stratigraphy spring up Zhangshanwen 31 refer that multi type break control overlap and unconformity trap base on researching sequence of Zhungaer basin Bohaibay basin and Songliao basin in 2003 Lipilong 35 39 refer that tectonic and deposit control overlap and unconformity trap in 2003 and 2004 Tectonic movement cause basin up and down formed large area exceed peel zone in edge of basin It is benefit to form trap Tectonic form nosing structures in basin It is benefit to form traps Deposit control reservoir and barrier layer forming Yishiwei 42 propose that oil accumulation controlled three surface lake extensive surface unconformity surface and fault surface according to Erlian basin Jizhong depression overlap and inconformity reservoir characteristic Overlap and unconformity reservoir distribution are controlled by truncation zone and overlap zone Enriching is controlled by beneficial accumulating phase belt 3 Oil and gas migration and accumulation mechanism of stratigraphic trap Reservoir is resuk of oil and gas migrating and accumulating in long distance due to stratigraphic trap far from hydracarbon source rock It is controlled by migrating dynamic passageway path distance and accumulation etc Lipilong 35 39 refer that the most effective oil path is fault sand fault unconformity and fault sand unconformity compound transmit system for overlap and unconfortuity trap in 2003 and 2004 Lichunguang 44 refer that heavy crude is secondary gas oil pool through unconformity path migrating and accumulating in unconformity accompany trap based on researching feavy crude reservoir of Dongying depression in 1999 Zhangjiazhent and Wangyongshi 48 refer that Y Lhezhuang reservoir mainly lie in 100m above old burial hill old layer reflect shaft in 2005 Capping formation and barrier formation control the accumulation of the area oil and gas Better Capping formation and barrier formation better oil accumulation Suifenggui 17 refers that it is key for stratigraphic trap accumulation that T S transmit system validity and ability consist of oil soures fault sand and ubconformity in 2005 in Jiyang depression Layer unconformity style affects the stratigraphy trap forming and oil and gas Formation Mechanism and Distribution of Paleogene Neogene Stratigraphic Reservoirs in Jiyang Depression 7 migration Lvxiuxiang refer that migration in uncomformity is thin bed migration through oil migrating physical ana