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1、Heavy Oil Development Technology of Liaohe OilfieldHan Yun(Scientific Research Information Department Exploration&Development Research Institute，Liaohe Oilfield Company) Liaohe Oilfield，the largest heavy oil production base in China，features in various reservoir types，deep burial，and wide range of c

2、rude oil viscosityFor many years，a series of technologies have been developed for different oil products and reservoir types of the oilfield，of which water flooding，foam slug drive，steam stimulation，steam drive,and SAGD are the main technologies. After continuous improvement，they have been further d

3、eveloped and played an important role in the development of heavy oil in the oilfield Liaohe Oilfield is abundant in heavy oil resources，46 of the total proved reserves of Liaohe Oilfield Company. Horizontally the resources concentrates in the West Depression and the southern plunging belt of the Ce

4、ntral Uplift in Liaohe Rift. Vertically,it is mainly distributed in Paleocene Shahejie Formation(ES). The distinctive geological feature of Liaohe 0ilfield is manifested in three aspects：first，the heavy oil reservoirs are deeply buried and 80 of them are buried more than 900m deep；second，the heavy o

5、il viscosity ranges widelyFor most of the reservoirsthe dead oil viscosity ranges in 100100000mPas with the maximum 650000mPas.Third the reservoir types are various with complicated oilwater relationship，most of the reservoirs are edge water and bosom water reservoirs and there are also edge water r

6、eservoirs，top water reservoirs and bosom water reservoirs For more than 20 years of development，Liaohe Oilfield has developed series of heavy oil development technologies for different oil products and different types of reservoirs，such as water flooding, foam slug drive,steam stimulation steam driv

7、e and SAGDThe most difficult issues have been overcome in the development of the super heavy oil in deeper formationwhich has maintained the annual heavy oil output at 8 million tons for many years in Liaohe Oilfield Water flooding development technology for conventional heavy oil-type 1 Based on he

8、avy oil classification,the conventional heavy oiltype I refers to the heavy oil with viscosity ranging in 50100mPas，taking up about 20 of the proved oil reserves of the oilfieldThe heavy oil reservoirs of this type are buried ranging from 1 500m to 2400m deep and are capable of flowingTherefore，natu

9、ral energy is utilized for conventional development and then water flooding technology is usedFor example，the reservoir of $32 oil unit of Block Leng-43 is buried 1 650l 940m deep with the average oil zone 87.7m thick and the oil viscosity in situ 58mPasIn 1992，the 141 m spacing square well pattern

10、was adopted to develop the kind of reservoirs by utilizing natural energy and two sets of oil production zonesIn 2004，water flooding technology was applied. Currently,the degree of reserve recovery reaches 14the annual oil recovery rate is 1，and the ultimate recovery ratio is predicted to be as high

11、 as 22 Technology of foam slug and for conventional heavy oil-type steam flooding for conventional heavy oil-type 2 The upper limit of viscosity for the conventional heavy oiltype II is l 0000mPas(the dead oil viscosity in situ)This kind of heavy oil is the dominant type of heavy oil in Liaohe Oilfi

12、eld，accounting for 60 of total proved reservesThe reservoir of such heavy oil is buffed 800-1 600m deep in genera1. At initial development stage, steam stimulation was carried out to develop this kind of reservoirsIn the higher cycles of steam flooding，the reservoirs with the heavy oil viscosity clo

13、se to the lower limit of this kind of heavy oil are conversed into the steam drive developmentPilot tests of foam slug and steam flooding have conducted in Block Jin-90 and Block Qi-40 successfully,and they will be applied to the whole blocks in near futureThe recovery factor is forecast to be up to

14、 50 60 Steam stimulation technology for special heavy oil The special heavy oil refers to the heavy oil with the viscosity ranging in 1000050000mPas in situ,which takes up 10% of proved oil reserves of the oilfield. The reservoir of the kind of oil is buried ranging from 1400m to 1800m. Steam simula

15、tion technology is often applied to develop such reservoirs. However, technology of steam drive or SAGD are also under research and experiments for reservoirs of good quality.SAGD technology for super heavy oil The super heavy oil reservoir refers to the heavy oil with dead oil viscosity in situ ove

16、r 50000mPas, which accounts for 10% of proved reserves of the oilfield. Due to its extremely high viscosity, it is just developed for few years. For the massive super heavy oil reservoirs, SAGD can be applied in the late stage of steam stimulation. At present, good intermediate results have been obt

17、ained in SAGD pilot test in Block Du-84 of Guantao Formation, showing good prospect for application. They have been applied in the whole block and the ultimate recovery factor is predicted to achieve 55%. Conclusion Various technology should be applied to develop different types of heavy oil reservo

18、irs. Besides the technologies mentioned above, the technologies of combustion in situ, flue gas drive, and steam foam drive are also under research currently. Therefore, various development technologies will be increasingly improved with the heavy oil development of Liaohe Oilfield.References 1 Wang

19、 Xu. 2006. Heavy Oil Development Technologies and Discussion on the Research Orientation in the Next Step. Petroleum Exploration and Development J,33(4):484490 2 Liu Junrong. The Paper Collection of Liaohe Oilfield Development Seminar C:Beijing, Petroleum Industry Press, 2002 3 Zeng Yuqiang. 2006. H

20、eavy Oil steam Stimulation Review. Special Oil&Gas ReservoirJ, 13(6):59辽河油田的重油开发技术韩云（科研信息部门勘探和开发研究所、辽河油田公司）辽河油田，在中国最大的重油生产基地，在不同的储层类型，具有埋藏深，与原油粘度范围宽。多年来，一系列的技术已经被开发用于不同的石油产品和油田的储层类型，其中水驱，泡沫驱，蒸汽吞吐，蒸汽驱动，和SAGD技术主要有。经过不断的改进，他们已经得到了进一步的发展和在油田稠油开发的重要作用。辽河油田重油资源丰富，辽河油田公司的总探明储量的46%。横向的资源集中在西部凹陷，南部倾带在辽河断陷中央隆

21、起。纵向上，主要分布在古新统沙河（ES）。辽河油田独特的地质特征主要表现为三个方面：第一，重油油藏埋藏深，80%被埋超过900米深；第二，重油的粘度范围广泛。对于大多数的油藏，死油的粘度范围在100100000mpa，而最大值约为650000mpa；第三，油藏类型是各种复杂的油水关系，大多数的油藏边水和怀水库也有边水库，上水库和怀水库。20多年的发展，辽河油田开发了不同油品、不同类型油藏稠油开发技术系列，如水驱，泡沫驱，蒸汽吞吐蒸汽驱和SAGD。最难的问题已被克服，在超稠油开发中具有更深的地层。保持着每年稠油产量在8000000吨辽河油田多年。常规稠油注水开发技术1型基于稠油分类，常规稠油I型是指稠油粘度为50到100mPas，约为已探明石油储量的油田20%。这种类型的重油油藏埋从500米至2400米深,能够流动。因此,自然能源用于常规发展,然后注水技术是使用。例如,油藏32美元的石油单位块Leng-43深埋16501940m，平均石油区厚87.7米和油粘度原位58 mPas。1992，141米间距的正方形井网是通过利用自然能源和两套油生产区开发该类储层中的应用。2004，应运水驱技术。目前，采出程度达到14%。每年的油回收率为1%，和最终采收率预计将高达22%。泡沫段塞技术和常规稠油蒸汽驱常规稠油2型对于常规稠油型