四川盆地深层海相碳酸盐岩缝洞型储层预测关键技术——以SN地区茅口组为例  

Key techniques for prediction of fractured carbonate reservoirs in deep marine carbonate rocks in Sichuan Basin:A case study of the Maokou Formation in SN area

作　　者：张光荣[1,2] 张旋 喻颐 张红英 廖奇 张福宏 赵艾琳 梁瀚 Zhang Guang-rong Zhang Xuan Yu Yi Zhang Hong-ying Liao Qi Zhang Fu-hong Zhao Ai-lin Liang Han(Chengdu University of Technology ,Chengdu 610059 ,China PetroChina Southwest Oil and Gas Field Company ,Chengdu 610041 ,China)

机构地区：[1]成都理工大学,四川成都610059 [2]中国石油西南油气田公司,四川成都610041

出　　处：《天然气地球科学》2017年第8期1235-1242,共8页Natural Gas Geoscience

基　　金：中国石油天然气股份有限公司重大科技专项"四川盆地深层海相碳酸盐岩勘探开发技术现场实验"(编号:2014E-3208(GF));国家科技重大专项"大型油气田及煤层气开发"(编号:2011ZX05004-005;2016ZX05004-005);中国石油天然气集团公司重大科技专项"西南油气田天然气上产300亿立方米关键技术研究与应用"(编号:2016E-06);中国石油科研项目"安岳气田震旦系碳酸盐岩气藏开发评价与研究"联合资助

摘　　要：下二叠统茅口组是四川盆地天然气勘探开发的重要层系之一。缝洞型储层埋藏深且存在着较强的非均质性,测井评价、叠前处理、储层预测难度大。为此,开展地球物理技术攻关研究并形成了配套技术,主要包括:(1)通过对录井、常规测井、电成像和斯通利波测井资料进行深入地分析,建立储层测井响应特征,掌握缝洞纵向分布规律;(2)据此,在静校正、信噪比、一致性和提高分辨率等方面提出保幅处理技术,获得了高精度的地震资料;(3)通过模型正演建立了茅口组储层地震响应模式,指导优选地震属性开展缝洞定性预测;(4)通过叠前随机反演来进行储层的定量预测,采用三维可视化雕刻技术实现碳酸盐岩缝洞单元的空间刻画;(5)在进行缝洞自动追踪基础上,建立离散模型,实现缝洞连通性分析。预测结果经验证与实钻吻合较好,可以为下一步井位部署提供依据,提出"走出构造找岩溶"、"走出浅层找深层"的新思路,对茅口组复杂碳酸盐岩气藏的深化勘探开发和扩展勘探新领域都具有重要的指导意义。The Lower Permian is one of the important strata of natural gas exploration and development in Sichuan Basin. There are strong heterogeneity,welt logging evaluation, prestack processing and reservoir prediction of fracture cave type reservoirs. Therefore, to carry out research of geophysical technology and the formation of supporting technology, mainly include： first, through in-depth analysis of logging, conven tional logging and electric imaging and stone wave logging data, establish reservoir logging response characteristics, grasp the fractured vertical distribution; Second, on the basis of this, put forward the amplitude preserving processing technology in in terms of static correction,SNR,consistency and improve the resolu tion of seismic data,the high accuracy;through the forward model, establish Maokou reservoir seismic response model,guide the optimization of seismic attributes to carry out cave of prediction;through the prestack stochastic inversion,predict quantitative reservoir.The carbonate fracture cave unit used 3D visualiza- tion technology of space carving in the depiction;Cave Automatic Tracking Based on the discrete model for fractured vuggy connectivity is analyzed.The prediction results proved consistence with the actual drilling well, which provide a basis for well deployment, and put forward ＂go out looking for karst structure＂, shal low deep to find out the new ideas.It has important guiding significance to deepen the exploration and development of new exploration field expansion of Maokou Formation of complex carbonate gas reservoir.

关 键 词：四川盆地 茅口组气藏 三维地震 处理 正演 储集层预测 

分 类 号：TE132.1[石油与天然气工程—油气勘探]