松辽盆地北部基岩储层有效性评价技术  

Evaluation Techniques of Bedrock Reservoir Effectiveness in the Northern Songliao Basin

作　　者：高涛[1] 王春燕[1] 王海燕[1] 金雪英[1] 覃豪[1] Gao Tao;Wang Chunyan;Wang Haiyan;Jin Xueying;Qin Hao(PetroChina Daqing Oilfield Co.,Ltd.,Daqing,Heilongjiang 163712,China)

机构地区：[1]中国石油大庆油田有限责任公司,黑龙江大庆163712

出　　处：《特种油气藏》2024年第2期57-65,共9页Special Oil & Gas Reservoirs

基　　金：中国石油重大科技专项“大庆油气持续有效发展关键技术研究与应用”(2016E-0203)、“松辽盆地深部含油气系统研究”(2021DJ0205)。

摘　　要：针对松辽盆地北部基岩岩性复杂、储层致密、裂缝发育以及储层参数计算精度低、储层有效性评价难等问题,提出“原岩+成分+结构”的三维岩性识别新方法;利用声波-密度交会图计算斜率M,利用中子-密度交会图计算斜率N,建立了基于M、N的变骨架密度有效孔隙度模型;通过研究基岩导电机理,校正裂缝附加导电性,建立了含裂缝储层含气饱和度模型;综合考虑有效孔隙度、次生孔隙度及裂缝发育程度,确定了基岩储层有效厚度标准及有效储层分类标准。应用结果表明:该套技术岩性解释符合率可达87.5%,气层识别符合率达88.5%,孔隙度、饱和度计算精度满足储量规范要求。研究结果可为松辽盆地北部基岩储层地质勘探及储量评价提供技术保障。To address the problem such as the complex bedrock lithology,dense reservoirs,fracture development,low calculation accuracy of reservoir parameter and difficult evaluation of reservoir effectiveness in the northern Songliao Basin,a new three-dimensional lithology identification method of"original rock+composition+structure"was proposed;the effective porosity model for variable skeletal density based on M and N was established by calculating the slope M using the acoustic-density rendezvous plot and the slope N using the neutron-density rendezvous plot;the gas saturation model of fracture-containing reservoir was established by studying the conductivity mechanism of bedrock and correcting the additional conductivity of fractures;the effective thickness standard of bedrock reservoir and the classification standard of effective reservoir were determined by considering the effective porosity,secondary porosity and the degree of fracture development.The application results show that the lithologic interpretation compliance rate of this set of technology can reach 87.5%,the gas-bearing formation identification compliance rate reaches 88.5%,and the calculation accuracy of porosity and saturation meets the requirements of the reservoir specification.The study results can provide technical guarantee for the geological exploration and reserve evaluation of bedrock reservoirs in the northern Songliao Basin.

关 键 词：基岩储层 储层有效性评价 岩性识别 有效孔隙度 含气饱和度 储层分类 松辽盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]