商13-45断块区低渗透油藏整体评价及开发技术对策研究
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摘要
针对商13-45断块区沙二下亚段储层大段合注合采造成水淹程度不均和平面注采不完善、储量动用状况变差的问题,结合钻井、油水井动态等资料,通过沉积微相、剩余油和油藏数值模拟分析,对工区进行了整体评价及开发技术对策研究。认为研究层位具有两个三角洲相与湖泊相互为消长的三角洲发育旋回,储层可划分为河口砂坝砂和远砂坝砂两种类型,属中-低孔、低渗储层。其层间渗透率差异不大,但层内非均质严重,层内矛盾突出。按含油面积、储量、砂体分布形态等参数对研究区39个含油小层进行了分类评价,将其划分为主力层和非主力层。采用油藏数值模拟和动态分析相结合的方法,开展剩余油分布规律研究,得出研究区剩余地质储量615.9×104t,计算出最终采收率目标值为30.9%。在此基础上,应用地质储层分类和储量动用分类法,进行小层潜力分析,将研究层位的39个小层分为三类。提出研究区开发经济政策界限为:当油价取＄35美元/桶时,新井经济极限初产为3.2t/d;老井经济极限日产油量0.5t,经济极限含水96%;老井压裂的经济极限日增油量为1.5t、累增油量为340t;补孔的经济极限日增油量为0.5t、累增油量为210t。最后根据开发经济政策界限,对研究区进行开发调整,调整原则以经济效益为中心,充分利用老井分断块层系完善注采井网,其中主力断块为商13-45、商13-19块,将剩余油富集区细分为1-3砂组、4砂组两套,井网部署结合断块特征、储层的发育及剩余地质储量,增加注采井点,保证单井有效厚度在10m以上、控制储量10×104t以上,井距控制在250m左右。
With the research of sediment microfacies, remaining oil distribution and three-dimensional geological modeling, the comprehensive evaluation and technical development strategies for low-permeability reservoirs in the lower member of Es_2 of Shang 13-45 Block were studied. It was considered that here were two sedimentary cycles and the intrafomational heterogeneity was intensity. Based on the oiliness area, reserves and conformation of sand body, 39 sublayers were patitioned essential layers and non-essential layers. Then, using the black oil model of VIP petroleum reservoir simulation software from LandMark Company, the 3D geological model of three sands were built, and distribution law of remaining oil was studied. The consummation degree of injection-production system controlled the distribution of reamining oil, and the sediment microfacies with heterogeneity were the main factors of it. From the result of reservoir numerical simulation, the remaining geologic reserves was 615.9×104t. Thus, the 39 sublayers were patitioned three species, and the final recovery ratio was 30.9%. Finally, the technical and economic limits of exploitation was brought out. When the oil price was＄35 pre barrel, the limit original production of fresh wells was 3.2t/d, the limit production of old wells was 0.5t/d, the limit economy water cut was 96%, the limit economy adding oil per day of fracture in old wells was 1.5t with 340t of accumulation, and the limit economy adding oil per day of perforation was 1.5t with 210t of accumulation. Based on it, the emploitation adjustment project was given. The Shang13-14 and Shang13-19 Blocks were essential goal. The enrichment section of remaining oil of them was separated into 1-3th sands and 4th sands. The available thickness of single well was more than 10m, controlled reserves was more than 10×104t, and the distance of wells was more than 250m.
With the research of sediment microfacies, remaining oil distribution and three-dimensional geological modeling, the comprehensive evaluation and technical development strategies for low-permeability reservoirs in the lower member of Es_2 of Shang 13-45 Block were studied. It was considered that here were two sedimentary cycles and the intrafomational heterogeneity was intensity. Based on the oiliness area, reserves and conformation of sand body, 39 sublayers were patitioned essential layers and non-essential layers. Then, using the black oil model of VIP petroleum reservoir simulation software from LandMark Company, the 3D geological model of three sands were built, and distribution law of remaining oil was studied. The consummation degree of injection-production system controlled the distribution of reamining oil, and the sediment microfacies with heterogeneity were the main factors of it. From the result of reservoir numerical simulation, the remaining geologic reserves was 615.9×104t. Thus, the 39 sublayers were patitioned three species, and the final recovery ratio was 30.9%. Finally, the technical and economic limits of exploitation was brought out. When the oil price was＄35 pre barrel, the limit original production of fresh wells was 3.2t/d, the limit production of old wells was 0.5t/d, the limit economy water cut was 96%, the limit economy adding oil per day of fracture in old wells was 1.5t with 340t of accumulation, and the limit economy adding oil per day of perforation was 1.5t with 210t of accumulation. Based on it, the emploitation adjustment project was given. The Shang13-14 and Shang13-19 Blocks were essential goal. The enrichment section of remaining oil of them was separated into 1-3th sands and 4th sands. The available thickness of single well was more than 10m, controlled reserves was more than 10×104t, and the distance of wells was more than 250m.
引文
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[14]V．P．Werivszky．Janos Szabari and Janos Geiger SPE278 1 0 Magic Wand?一Solving the Recovery Problem of a Damaged．Turbidite--Type Reservoir by Horizontal Sections Kicked OffFrom Existing Vertical Wells，1994
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[16]黄延章．低渗透油层渗流机理[M]．北京：石油工业出版社，1998
[17]陈彪，等．潜江组低渗透油藏稳产技术研究与实践[J]．江汉石油科技，2001，11(2)：31-35
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[19]韩永龙，等．超前注水的理论与实践[A]．大庆油田油藏工程优秀论文集，1999
[20]熊敏，石伯仲．商河油田储层的敏感性评价[J]．江汉石油学院学报，2001，23(4)：35-37
[21]徐永高，曾亚勤，李赣勤．特低渗油藏开发可行行动态评价[J]．江汉石油学院学报，2004，26(2)：91—92
[22]张志根，等．老井侧钻水平井国外情况调研[R]．东营：胜利石油管理局地质科学研究院，1997
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[24]柯仲华，等．俄罗斯低渗油藏水平井系统开发技术-布井方案与实例研究[R]．北京：水平井钻采技术研讨会，1996
[25]程启贵，等．靖安油田地质和油藏工程技术应用效果[J]．石油学报，2002，23(6)：68-71
[26]周受超，等．国外裂缝性低渗透砂岩油藏开发历程及工艺技术系列研究[R]．吉林：吉林省油田管理局，1993
[27]刘长生，等．裂缝性低渗透油气藏及某些复杂情况下的水平井技术[J]．中国石油天然气总公司石油信息研究所，1996，29(91)：46-47，189-191，196-197
[28]马收，等．深井低渗透油藏整体改造配套技术[R]．西安：低渗透油田开发配套技术座谈会，1998
[29]胡坚．国外低渗透油藏的钻井技术和完井技术[R]．石油工业钻采工艺科技情报协作组，1989
[30]马中海，等．胜利油田与国内外石油专业技术水平跟踪调研[R]．东营：胜利石油管理局钻井工艺研究院，2000
[31]马广彦，低渗透油田油水井化学解堵技术[J]．试采技术，1998，19(1)：37-41，70
[32]袁飞，等．低渗透裂缝性油藏酸化技术研究[R]．北京：低渗透油田开发配套技术座谈会，1998
[33]唐汝众．胜利油田低渗透油藏开发配套技术[R]．东营：低渗透油田开发配套技术座谈会，1998
[34]郝新武，李亚辉等．大芦家临56-4断块沙二下低渗透边水综合调整数值模拟研究油藏数值模拟[J]．西安石油大学学报，2005，20(5)：31-35
[35]李春，等．低渗透率油层聚合物驱油特点及效果[J]．油田化学，1996，13(4)：349-352
[36]许宁，等．得克萨斯州NHSU油田低渗砂岩油藏水平井注采[J]．世界石油工业，1997，4(4)：40-43
[2]孙卫，曲志浩，李劲峰，等．安塞特低渗透油田见水后的水驱油机理及开发效果分析[J]．石油实验地质，1999，21(3)：31-36
[3]裘怿楠，薛淑浩编著．油气储层评价技术[M]．北京：石油工业出版社，1997
[4]P．G．Pore—space statistics and capillary pressure curves from volume—controlled porosimetry[J]．SPE Formation Evaluation，1994，16(3)：46—54
[5]H．H．Yuan．Pore—scale heterogeneity from mercury porosimetry data[J]．64th annual technical conference and exhibition of SPE San Antonio，1989，11(8)：465-483
[6]H．H．Yuan，B．F．Swanson．Resolving Pore—space characteristics by rate—controlled porosimetry[J]．SPE Formation Evaluation，1989，26(2)：17—24．
[7]何更生，著．油层物理[M]．北京：石油工业出版社，2000
[8]牟学益，刘永祥．低渗透油田启动压力梯度研究[J]．油气地质与采收率，2001，8(5)：10—17
[9]胡明卫，杨鲁等．极复杂断块油气藏开发特点及挖潜方法探讨[J]．内蒙古石油化工，2002，29(91)：97—98
[10]万仁溥．中国不同类型油藏水平井开采技术[M]．北京：石油工业出版社，1997
[11]周全兴，崔士斌．水平井开发低渗透油藏的研究与应用[J]．石油钻探技术，1999，27(1)：46—48
[12]刘翔鹗，刘尚齐．国外水平井技术应用论文集[M]．北京：石油工业出版社，2001
[13]李道品．对高效开发低渗透油田的认识和建议[R]．桂林：山东石油学会低渗透油藏开发技术研讨会论文，2001
[14]V．P．Werivszky．Janos Szabari and Janos Geiger SPE278 1 0 Magic Wand?一Solving the Recovery Problem of a Damaged．Turbidite--Type Reservoir by Horizontal Sections Kicked OffFrom Existing Vertical Wells，1994
[15]李道品，等．低渗透砂岩油田开发[M]．北京：石油工业出版社，1997
[16]黄延章．低渗透油层渗流机理[M]．北京：石油工业出版社，1998
[17]陈彪，等．潜江组低渗透油藏稳产技术研究与实践[J]．江汉石油科技，2001，11(2)：31-35
[18]李松泉，唐曾熊．低渗透油藏人工(或天然)裂缝与井网的优化配置[R]．北京：低渗透油田开发配套技术座谈会材料，1998
[19]韩永龙，等．超前注水的理论与实践[A]．大庆油田油藏工程优秀论文集，1999
[20]熊敏，石伯仲．商河油田储层的敏感性评价[J]．江汉石油学院学报，2001，23(4)：35-37
[21]徐永高，曾亚勤，李赣勤．特低渗油藏开发可行行动态评价[J]．江汉石油学院学报，2004，26(2)：91—92
[22]张志根，等．老井侧钻水平井国外情况调研[R]．东营：胜利石油管理局地质科学研究院，1997
[23]谢平安．大庆低渗透油田水平井增产及开采技术[R]．大庆：水平井钻采技术研讨会，1996
[24]柯仲华，等．俄罗斯低渗油藏水平井系统开发技术-布井方案与实例研究[R]．北京：水平井钻采技术研讨会，1996
[25]程启贵，等．靖安油田地质和油藏工程技术应用效果[J]．石油学报，2002，23(6)：68-71
[26]周受超，等．国外裂缝性低渗透砂岩油藏开发历程及工艺技术系列研究[R]．吉林：吉林省油田管理局，1993
[27]刘长生，等．裂缝性低渗透油气藏及某些复杂情况下的水平井技术[J]．中国石油天然气总公司石油信息研究所，1996，29(91)：46-47，189-191，196-197
[28]马收，等．深井低渗透油藏整体改造配套技术[R]．西安：低渗透油田开发配套技术座谈会，1998
[29]胡坚．国外低渗透油藏的钻井技术和完井技术[R]．石油工业钻采工艺科技情报协作组，1989
[30]马中海，等．胜利油田与国内外石油专业技术水平跟踪调研[R]．东营：胜利石油管理局钻井工艺研究院，2000
[31]马广彦，低渗透油田油水井化学解堵技术[J]．试采技术，1998，19(1)：37-41，70
[32]袁飞，等．低渗透裂缝性油藏酸化技术研究[R]．北京：低渗透油田开发配套技术座谈会，1998
[33]唐汝众．胜利油田低渗透油藏开发配套技术[R]．东营：低渗透油田开发配套技术座谈会，1998
[34]郝新武，李亚辉等．大芦家临56-4断块沙二下低渗透边水综合调整数值模拟研究油藏数值模拟[J]．西安石油大学学报，2005，20(5)：31-35
[35]李春，等．低渗透率油层聚合物驱油特点及效果[J]．油田化学，1996，13(4)：349-352
[36]许宁，等．得克萨斯州NHSU油田低渗砂岩油藏水平井注采[J]．世界石油工业，1997，4(4)：40-43