利用静压数据探讨渤海海域常压油藏砂体连通性

doi:10.11743/ogg20160416

摘要/Abstract

摘要： 基于同一个油藏压力系统的一致性，常压条件下地层压力与海拔理论上的线性关系是目前判断同一层序地层格架下砂体连通关系的重要依据。受储层高渗与流体非均质性的影响，判断砂体连通性的线性规律存在局限。通过数学归纳分析，发现常压油藏砂体连通关系的新方法，即建立压力系数与海拔的反比例函数关系。根据反比例函数的相交性、单调性、有界性与对称性，探讨反比例函数性质与油藏压力系统的关系，进一步判断砂体的连通性。针对渤海海域7个油田、50余个开发井已证实连通关系的常压油藏，验证压力系数-海拔反比例函数性质与砂体连通性的关系并证实：①函数图像连续且相交重合、单调性与渐近线一致且对称轴唯一是判断同一层序地层格架下砂体相连通的关键依据；②压力系数对分析砂体的连通关系比地层压力的线性关系更为敏感、可靠；③函数曲率受储层渗透性和流体性质等影响，规避了线性规律的局限。

关键词: 压力系数, 反比例函数, 流体非均质性, 渗透性, 常压油藏, 渤海海域

Abstract: Based on the consistency of pressure system within the same reservoir,the theoretical linear relationship between formation pressure and depth is currently used as an important criterion to determine the connectivity of sand bodies within the same sequence stratigraphic framework under normal pressure.However,the linear rule for determining sandbodies connectivity has its limitations due to the influences of high permeability and fluid heterogeneity of reservoir.A new method for connectivity analysis of sand bodies is proposed based on mathematical induction,established the inverse proportional function between pressure coefficient and depth of reservoir.The properties of inverse proportional function such as intersection,monotonicity,boundedness and symmetries provide us a way to explore the relationship between inverse proportional function and reservoir pressure system,and to further determine the connectivity of two or more sand bodies.With hydrostatic pressure data from more than 50 normal pressure reservoirs out of 7 oilfields in Bohai Sea whose connectivity have been confirmed by wells,we verified the relationship between the connectivity of sand bodies and the properties of inverse proportional function of pressure coefficient and depth.The following conclusions were made.① The function image being continuous and overlapping,monotonicity and asymptote being consistent,and symmetry axis being unique are the critical criteria for determining the connectivity of sand bodies within the same sequence stratigraphic framework;② The pressure coefficient is more sensitive and reliable than the linear function;③ The curvature of inverse proportional function is affected by reservoir permeability and fluid properties,thus overcomes the limitations of linear rule.

Key words: pressure coefficient, inverse proportional function, fluid heterogeneity, permeability, normal pressure reservoir, Bohai Sea

中图分类号:

TE122.2

钱赓,张建民,刘传奇,等. 利用静压数据探讨渤海海域常压油藏砂体连通性[J]. 石油与天然气地质, 2016, 37(4): 584-590,597. doi: 10.11743/ogg20160416 Qian Geng,Zhang Jianmin,Liu Chuanqi,et al. A study on sand bodies connectivity in normal pressure reservoirs of the Bohai Sea with hydrostatic pressure data[J]. Oil & Gas Geology, 2016, 37(4): 584-590,597. doi: 10.11743/ogg20160416

参考文献

[1] 刘传奇,吕丁友,侯冬梅.渤海A油田砂体连通性研究[J].石油物探,2008,47(3):251-255.Liu Chuanqi,Lv Dingyou,Hou Dongmei.Study of connectivity of sand bodies in oilfield A,Bohai area[J].Geophysical Prospecting for Petroleum,2008,47(3):251-255.
[2] Mark D.Zoback.Reservoir geomechanics[M].New York:Cambridge University Press,2007:3-55.
[3] 李传亮.油藏工程原理[M].北京:石油工业出版社,2005,11:5-7.Li Chuanliang.Fundamentals of reservoir engineering[M].Beijing:Petroleum Industry Press,2005,11:5-7.
[4] Selim Simon Shaker.Reservoir vs.seal pressure gradients:Calculations and pitfalls[C]//American Association of Petroleum Geologists,AAPG 2014 Annual Convention&Exhibition.Houston:Omnipress,2014:1834685.
[5] Selim Simon Shaker.Geopressure compartmentalization in Keathley Canyon deep water,Gulf of Mexico[J].Comparative Drama,2005,39(2):131-156.
[6] Leonardo Enrique Aguilera Gomez,Francisco Espitia Hernandez,Devendra Kumar,et al.Understanding pressure compartmentalization in Ultra deep-water drilling off Mexican Gulf Coast:A case study[C].//American Association of Petroleum Geologists,AAPG 2014 Annual Convention&Exhibition,Houston:Omnipress.2014:1841804.
[7] 潘福熙.ERCT电缆地层测试器应用实例研究[J].国外测井技术,2012(4):45-48.Pan Fuxi.Research of the ERCT wireline formation tester application[J].World Well Logging Technology,2012,(4):45-48.
[8] 马建国,符仲金.电缆地层测试器原理及其应用[M].北京:石油工业出版社,1995:1-174.Ma Jianguo,Fu Zhongjin.Principles and applications of wireline formation tester[M].Beijing:Petroleum Industry Press,1995:1-174.
[9] 陈永生,谭廷栋.地层压力理论与评价-压力计算参考书[M].北京:石油工业出版社,1990:1-157.Chen Yongsheng,Tan Tingdong.The pressure log reference manual-Theory and evaluation of formation pressure[M].Beijing:Petroleum Industry Press,1990:1-157.
[10] 王昌学,曹文利,王向荣.电缆地层测试压力梯度的计算与应用[J].石油勘探与开发,2008,35(4):476-481.Wang Changxue,Cao Wenli,Wang Xiangrong.Pressure gradient computation and application of wireline formation tester[J].Petroleum Exploration and Development,2008,35(4):476-481.
[11] 匡立春.电缆地层测试资料应用导论[M].北京:石油工业出版社,2005:1-140.Kuang Lichun.An introduction to applied of the wireline formation data[M].Beijing:Petroleum Industry Press,2005:1-140.
[12] 匡立春,毛志强,孙中春,等.基于新技术的油气藏测井综合评价[J].石油勘探与开发,2003,30(2):58-60.Kuang Lichun,Mao Zhiqiang,Sun Zhongchun,et al.Reservoir synthetic evaluation based on new loging technology[J].Petroleum Exploration and Development,2003,30(2):58-60.
[13] Thomas Finkbeiner,Mark Zoback,Peter Flemings,et al.Stress,pore pressure,and dynamically constrained hydrocarbon columns in the South Eugene Island 330 field,Northern Gulf of Mexico[J].AAPG Bulletin,85(6):1007-1031.
[14] Walter H.Fertl.Abnormal formation pressures-Implications to exploration,drilling,and production of oil and gas resources[M].Amsterdam:Elsevier Scientific Publishing Company,1976:1-349.
[15] 课程教材研究所.数学(八年级下册)[M].人民教育出版社,2008:38-62.Course materials research institute.Mathematics (grade eight)[M].Beijing:The People's Education Press,2008:38-62.
[16] 邓运华,王应斌.黄河口凹陷浅层油气成藏模式的新认识及勘探效果-来自BZ28-2S油田勘探历程的启示[J].中国石油勘探,2012,17(1):25-29.Deng Yunhua,Wang Yingbin.New recognition of shallow oil and gas reservoir forming mode and exploration achievements in Huanghekou Sag-Enlightenment from exploration process of BZ28-2S oilfield[J].China Petroleum Exploration,2012,17(1):25-29.
[17] 祝春荣,韦阿娟,沈东义.辽东湾地区锦州25-1油田油气成藏特点和运聚模拟研究[J].海洋石油,2011,31(3):17-22.Zhu Chunrong,Wei A'juan,Shen Dongyi.Pooling characteristics and hydrocarbon migration and accumulation modeling research in JZ25-1 oilfield in Liaodongwan area[J].Offshore Oil,2011,31(3):17-22.
[18] 周心怀,余一欣,魏刚,等.渤海辽东湾海域JZ25-1S转换带与油气成藏的关系[J].石油学报,2008,29(6):837-840.Zhou Xinhuai,Yu Yixin,Wei Gang,et al.Relationship between JZ25-1S transfer zone and hydrocarbon accumulation in Liaodongwan offshore of Bohai Bay Basin[J].Acta Petrolei Sinica,2008,29(6):837-840.
[19] 彭文绪,孙和风,张如才,等.渤海海域黄河口凹陷近源晚期优势成藏模式[J].石油与天然气地质,2009,30(4):510-518.Peng Wenxu,Sun Hefeng,Zhang Rucai,et al.Late-stage near-source preponderant hydrocarbon pooling pattern in the Huanghekou Sag of the Bohai Sea waters[J].Oil & Gas Geology,2009,30(4):510-518.