摘要
由于渤中19-6气田潜山裂缝性储层的储集空间多样、非均质性很强,且制约产能的主控因素认识不清,从而造成潜山裂缝性储层的产能预测困难.为了解决这一难题,综合岩心、测井、地质等资料分析了潜山裂缝性储层的特征,并基于CT扫描实验定量表征裂缝,研究裂缝微观特征,形成了以裂缝渗透率为核心的一系列裂缝参数的计算方法,建立了潜山裂缝性储层的产能预测模型,大幅提高了潜山裂缝性储层的产能预测精度.研究结果表明,潜山裂缝性储层的裂缝渗透率主要由裂缝的长度、宽度及连通性控制,与孔隙度的大小无明显关系,可以通过斯通利波反演的总渗透率与基质渗透率之差计算得到,其中基质渗透率计算的相对误差为28.50%,总渗透率计算的相对误差为15.56%;综合考虑潜山裂缝性储层的裂缝渗透率、裂缝纵向连通性和有效厚度,建立了渤中19-6气田潜山裂缝性储层的产能预测模型,其中裂缝渗透率计算结果的准确性决定了潜山裂缝性储层产能预测结果的可靠性.
In Bozhong 19-6 gas field, due to the different types of reservoir spaces, strong heterogeneity, and unclear of main controlling factor of productivity of buried-hill fractured reservoirs, which makes it difficult to predict the productivity. In order to solve this problem, the characteristics of buried-hill fractured reservoirs are analyzed based on core, logging, geological and other data. Additionally, based on the CT scan experiment, the fractures can be quantitatively characterized and a series of calculation methods of fracture parameters including fracture permeability are formed. As a result, the productivity prediction model for buriedhill fractured reservoirs is established and the problem of productivity prediction of buried-hill fractured reservoirs is solved. The research results show that the fracture permeability of buried-hill fractured reservoirs is mainly controlled by the length, width and connectivity of the fractures, and has no obvious relationship with the porosity. Then, the fracture permeability can be calculated from the difference between the total permeability obtained by Stoneley wave inversion and the matrix permeability. The relative errors of matrix permeability and total permeability calculations are respectively 28.50% and 15.56%. Based on the fracture permeability, fracture longitudinal connectivity and effective thickness of buried-hill fractured reservoirs, the productivity prediction model for buried-hill fractured reservoirs can be established in Bozhong 19-6 gas field. The accuracy of fracture permeability calculation result determines the reliability of productivity prediction result of buried-hill fractured reservoirs.
作者
李雄炎
秦瑞宝
Li Xiongyan;Qin Ruibao(CNOOC Research Institute,Beijing 100028,China)
出处
《地球科学》
EI
CAS
CSCD
北大核心
2023年第2期475-487,共13页
Earth Science
基金
国家自然基金企业创新发展联合基金项目“渤海潜山裂缝性储层地震响应机理及精确成像方法(No.U19B2008)”(No.YSLH-ZX-01-2021)
中海石油(中国)有限公司联合攻关项目“渤中19-6变质岩潜山储层测井评价关键技术研究与应用”(No.YSLH-ZX-01-2021)。
关键词
渤中19-6
潜山裂缝性储层
裂缝微观特征
裂缝渗透率
产能预测
测井评价
石油地质
Bozhong 19-6
buried-hill fractured reservoirs
fracture microscopic features
fracture permeability
productivity prediction
logging evaluation
petroleum geology
作者简介
李雄炎(1983-),男,博士,研究方向为测井评价理论、方法及应用研究.ORCID:0000⁃0002⁃3271⁃7044.E⁃mail:wangliaoziji@126.com。
