排2井区沙湾组油藏地质与开发方案研究
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摘要
准噶尔盆地车排子地区排2砂体位于准噶尔盆地西部隆起车排子凸起东部2号构造,含油面积15.4km2,石油地质储量800×104t,储层为三角洲砂体经过湖浪的再搬运和再沉积形成的滩坝砂,通过砂层对比和岩心分析,该区存在排2砂体和排206-x15砂体两套油层,属中浅层、中丰度、高产能、轻质原油储量,其储层物性特征为特高孔、特高渗,但也具有强水敏、强亲水的特点,地层易受到伤害,从而影响了最终采收率。
本文根据现有资料,首先进行油藏构造研究、储层对比及分布预测、测井精细解释及储层参数计算等研究工作,认为排2砂体均质程度为较均匀,平面连通性好,但弹性产率较低,天然能量不足,自然产能效果差,存在油层能量严重不足,需要补充能量开发。在此认识的基础上,通过开采方式、开发层系划分、开发井网和井距、单井日产能力、采收率预测等研究,确立了边外注水+断层东油井抽稀,断层西少部署一排油井的开发方案,利用数值模拟方法,预测采收率为55%,完成油藏开发方案的设计,为该区下一步开发提供了有力依据。
Well Pai-2 is located on the east No. 2 structure of Chepaizi raise on west uplift, Zhunga-er Baisin. The acreage of the oil field is 15.4km2 with hydrocarbon reserves of 800×104t. The main reservoirs are the beach and bar sand bodies formed by redistribution of the delta sediments. By strata contrast and core analysis, it is considered that two sets of oil-bearing sand bodies: Pai 2 and Pai 206-x15 are existed in this area, and their have middle-shallow burying depth, mid abundance and high productivity, belongs to low density rude oil. The reservoirs are characterized by super-high porosity and permeability, but also sensitive and conversant to water. So the reservoirs are easily to be damaged and consequently affected the final recovery efficiency.
Based on the available data, reservoir structure research, reservoir comparison and distribution prediction, fine logging interpretation and reservoir parameter calculation were achieved, and it can be considered that the physical properties of the Pai-2 sand-body is well-proportioned and well-connected on the plane, but its productivity is not stretchable and the natural energy is deficient. Based on these recognitions, by the analysis of production method, development formation division, development well grid and well spacing, single well daily rate and recovery efficiency prediction, etc, a development plan was brought to effect: it is all around affusion and made the oil-well of east fault sparse, and predicted the recovery efficiency of 55%, provide a sound foundation for the future development in the area.
本文根据现有资料,首先进行油藏构造研究、储层对比及分布预测、测井精细解释及储层参数计算等研究工作,认为排2砂体均质程度为较均匀,平面连通性好,但弹性产率较低,天然能量不足,自然产能效果差,存在油层能量严重不足,需要补充能量开发。在此认识的基础上,通过开采方式、开发层系划分、开发井网和井距、单井日产能力、采收率预测等研究,确立了边外注水+断层东油井抽稀,断层西少部署一排油井的开发方案,利用数值模拟方法,预测采收率为55%,完成油藏开发方案的设计,为该区下一步开发提供了有力依据。
Well Pai-2 is located on the east No. 2 structure of Chepaizi raise on west uplift, Zhunga-er Baisin. The acreage of the oil field is 15.4km2 with hydrocarbon reserves of 800×104t. The main reservoirs are the beach and bar sand bodies formed by redistribution of the delta sediments. By strata contrast and core analysis, it is considered that two sets of oil-bearing sand bodies: Pai 2 and Pai 206-x15 are existed in this area, and their have middle-shallow burying depth, mid abundance and high productivity, belongs to low density rude oil. The reservoirs are characterized by super-high porosity and permeability, but also sensitive and conversant to water. So the reservoirs are easily to be damaged and consequently affected the final recovery efficiency.
Based on the available data, reservoir structure research, reservoir comparison and distribution prediction, fine logging interpretation and reservoir parameter calculation were achieved, and it can be considered that the physical properties of the Pai-2 sand-body is well-proportioned and well-connected on the plane, but its productivity is not stretchable and the natural energy is deficient. Based on these recognitions, by the analysis of production method, development formation division, development well grid and well spacing, single well daily rate and recovery efficiency prediction, etc, a development plan was brought to effect: it is all around affusion and made the oil-well of east fault sparse, and predicted the recovery efficiency of 55%, provide a sound foundation for the future development in the area.
引文
[1] 俞启泰等.关于剩余油研究的探讨.石油勘探与开发[J], 1997,24(2):46～49
[2] 冉启佑.剩余油研究现状与发展趋势.油气地质与采收率[J],2003,10(5):49～51
[3] 李兴国等.应用微型构造和储层沉积微相研究油层剩余油分布.油气采收率技术[J],1994,1
[4] 鲁洪江等.砂岩油藏剩余油分布地质研究.成都理工学院学报[J],1999,26(3):270～272
[5] 汪立君,陈新军,等.储层非均质性对剩余油分布的影响.地质科技情报[J],2003,22(2):71～73
[6] 郭振彬等.雁翎油田油藏剩余油分布测井评价探讨.测井技术[J],1994,1996,18(3):219～226
[7] 冯少太等.国外剩余油饱和度的测量技术.断块油气田[J],1994,1(1):58～66
[8] 霍树义等.剩余油分布解释技术在胜利油区的应用.油气采收率技术[J],1994,1(2):55～58
[9] 杨通佑,范尚炯,陈元千,等.石油及天然气储量计算方法[M].北京:石油工业出版社,1990
[10] 郭腾明,赵永强,等.油藏数值模拟法预测剩余油分布及调整挖潜措施——以临南油田夏 32 块油藏为例.断块油气田[J],2002,9(3) :30～35
[11] 陈月明.油藏数值模拟基础[M].东营,石油大学出版社,1989
[12] Principles of Hydrocarbon Reservior Simulation G.W.Thomas.1982
[13] Petroleum Reservior Simulation K.Aziz and A.Settari.1979
[14] 李福垲.黑油和组分模型的应用[M].北京:科学出版社,1996
[15] 吴湘,桓冠仁,等.黑油模型计算方法和特殊岩心分析[M].北京石油勘探开发科学研究院,1983
[16] 油气藏工程计算方法(续篇)[M],陈元千著.石油工业出版社
[17] 蒋廷学等.油藏数值模拟技术发展综述. 河南石油[J], 2000,5:19～21
[18] 蒋庆坦.利用油水相对渗透率资料预测油田动态的进一步研究.河南石油[J],1998,6(2):53～56
[19] 王俊魁等.油气藏工程方法研究与应用[M].北京:石油工业出版社,1998:145～149
[20] 陈钦雷.油田开发设计与分析基础[M].北京:石油工业出版社,1982
[21] Chatia I,Morrow NR,Lim H T.Magnitude and Detailed Structure of Residual Oil Saturition[J].sol,pet,Eng.J,1983,(4):311～326
[22] Nick P,Valenti R M and Koederitz LF.A unified theory on residual oil saturation and irreducible water saturation[J].SPE77545,2002
[2] 冉启佑.剩余油研究现状与发展趋势.油气地质与采收率[J],2003,10(5):49～51
[3] 李兴国等.应用微型构造和储层沉积微相研究油层剩余油分布.油气采收率技术[J],1994,1
[4] 鲁洪江等.砂岩油藏剩余油分布地质研究.成都理工学院学报[J],1999,26(3):270～272
[5] 汪立君,陈新军,等.储层非均质性对剩余油分布的影响.地质科技情报[J],2003,22(2):71～73
[6] 郭振彬等.雁翎油田油藏剩余油分布测井评价探讨.测井技术[J],1994,1996,18(3):219～226
[7] 冯少太等.国外剩余油饱和度的测量技术.断块油气田[J],1994,1(1):58～66
[8] 霍树义等.剩余油分布解释技术在胜利油区的应用.油气采收率技术[J],1994,1(2):55～58
[9] 杨通佑,范尚炯,陈元千,等.石油及天然气储量计算方法[M].北京:石油工业出版社,1990
[10] 郭腾明,赵永强,等.油藏数值模拟法预测剩余油分布及调整挖潜措施——以临南油田夏 32 块油藏为例.断块油气田[J],2002,9(3) :30～35
[11] 陈月明.油藏数值模拟基础[M].东营,石油大学出版社,1989
[12] Principles of Hydrocarbon Reservior Simulation G.W.Thomas.1982
[13] Petroleum Reservior Simulation K.Aziz and A.Settari.1979
[14] 李福垲.黑油和组分模型的应用[M].北京:科学出版社,1996
[15] 吴湘,桓冠仁,等.黑油模型计算方法和特殊岩心分析[M].北京石油勘探开发科学研究院,1983
[16] 油气藏工程计算方法(续篇)[M],陈元千著.石油工业出版社
[17] 蒋廷学等.油藏数值模拟技术发展综述. 河南石油[J], 2000,5:19～21
[18] 蒋庆坦.利用油水相对渗透率资料预测油田动态的进一步研究.河南石油[J],1998,6(2):53～56
[19] 王俊魁等.油气藏工程方法研究与应用[M].北京:石油工业出版社,1998:145～149
[20] 陈钦雷.油田开发设计与分析基础[M].北京:石油工业出版社,1982
[21] Chatia I,Morrow NR,Lim H T.Magnitude and Detailed Structure of Residual Oil Saturition[J].sol,pet,Eng.J,1983,(4):311～326
[22] Nick P,Valenti R M and Koederitz LF.A unified theory on residual oil saturation and irreducible water saturation[J].SPE77545,2002