珠江口盆地A油田生物礁灰岩储层的精细油藏描述
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摘要
针对礁灰岩储层内部结构复杂的地质特点,以中国南海珠江口盆地A油田为例,介绍了从基础地质研究入手,采用地质模式指导下的多学科综合研究手段,充分应用地震、测井及地质资料信息,进行沉积相带展布、储层非均质性描述、裂缝类型与分布特征等研究。通过地层精细对比与划分,以及储层地质特征的研究,明确礁体内部的结构特征。采用高分辨率测井约束反演技术,对储层物性的空间分布特征进行了精细描述,并为地质模型的建立提供有效的地震约束。研究中针对断层、裂缝描述的难点,采用蚂蚁追踪技术,实现了小断层、裂缝的精细刻画,同时与渗透率相结合,实现了裂缝渗透性的定量描述。综合以上的研究成果,建立了储层精细地质模型,为开发方案的实施提供地质依据,并在实际钻井中得到了较好的验证。
Detailed reservoir description is a method of integrated reservoir study,with the purpose of researching structure,configuration of geobody,lithology,describing distribution of reservoir and fluid condition,detailed geology model has been provided for improving recovery and economical development of oil fields.In this paper,taking A oilfield which is located in Pearl River Mouth basin of South China Sea as an example,focusing on complicated geological characterization of reef reservoir,introducing a method of integrated study under the guidance of geology pattern which is based on fundamental geology study,using seismic,log and geological data,has been applied to the characterization of depositional facies,reservoir heterogeneity,reservoir inversion and fracture distribution to build detailed geology model which can provide necessary,credible geological recognition for oilfield development project and evaluation.
Detailed reservoir description is a method of integrated reservoir study,with the purpose of researching structure,configuration of geobody,lithology,describing distribution of reservoir and fluid condition,detailed geology model has been provided for improving recovery and economical development of oil fields.In this paper,taking A oilfield which is located in Pearl River Mouth basin of South China Sea as an example,focusing on complicated geological characterization of reef reservoir,introducing a method of integrated study under the guidance of geology pattern which is based on fundamental geology study,using seismic,log and geological data,has been applied to the characterization of depositional facies,reservoir heterogeneity,reservoir inversion and fracture distribution to build detailed geology model which can provide necessary,credible geological recognition for oilfield development project and evaluation.
引文
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[3]陈国威.南海生物礁及礁油气藏形成的基本特征[J].海洋地质动态,2003,19(7):32-37.
[4]施和生,杨少坤.珠江口盆地大型礁油田地质特征[M].北京:中国石化出版社,2003.
[5]胡平忠,王金中.珠江口盆地第三纪生物礁[M].北京:海洋出版社,1996.
[6]胡光义,古莉,孙立春,等.一体化地质建模在新近系礁灰岩储层定量表征中的应用[J].现代地质,2009,23(5):957-962.
[7]伍家和,李宗宇.缝洞型碳酸盐油藏溶洞描述技术研究[J].石油地质与工程,2010,24(4):34-39.
[8]王琳,周文,何胡军.川北地区二叠系生物礁储层特征研究[J].石油地质与工程,2011,25(1):28-31.
[9]杨立强.测井约束地震反演综述[J].地球物理学进展,2003,18(3):530-534.
[10]乐群星,魏法杰.蚂蚁算法的基本原理及其研究发展现状[J].北京航空航天大学学报(社会科学版),2005,18(4):5-8.
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