第40卷第2期
天然气勘探与开发
川中地区下二叠统自云岩储层测井评价
赵艾琳谢冰何绪全昊煜宇
中国石油西南油气田公司勘探开发研究院
地质勘探
热次盆相白云岩岩性复杂、富含硅质、非灼质性强，测并储层精细评价困难；霞组白云岩受岩离及多期构遗作用影响，缝发育，储层厚度薄，基质具有低孔隙、低渗透特征，储层评价及产能预测难度大，通过综合分析常规测并、成像测井、降列声波测井资料，结合地质录井资料，建立白云石、方解石和硅质岩等复杂岩性及非均质构造识别标准，解决了茅口组硅质白云岩岩性识别间题：基于成像裂续、孔稠参数、斯通利波能量衰减、核磁孔隙结构参数建立了储层定量判别标准及图版。该方法在川中地区下二叠统储层评价中取得了良好的应用效果，测并解释特合率超过80%，为川中地区下二叠统天然气储量申报提供了技术文持，为川中地区高石梯一磨溪一龙女寺地区立体勘探、寻找规模储量与资源接替领城提供了支撑作用，
关键词四川盆地川中地区早二叠世裂缝一孔测型储层 DOI: 10.12055/gaskk.issn.1673-3177.2017.02.001
非灼质性
岩性识别
特殊测并
储层评价
符合率
Well logging evaluation of the Lower Permian dolomite reservoirin central
Sichuan Basin
Zhao Ailin, Xie Bing, He Xuquan, Wu Yuyu
(Research Instituteof Exploration &Development,PetroChina SouthwestOil &GasField Company,Chengdu,Si chuan610041,China)
Abstract: The fracture-cavity dolomite reservoirs develop in the Lower Permian Maokou Formation and Qixia Formation in the cen tral Sichuan Basin, and have contributed high-yield industrial gas flow during testing of several wells. However, the Maokou Forma-tion dolomite of hydrothermal sub-basin facies is complex in lithology, rich in siliceous content, and strong in heterogeneity, bringing challenges to fine reservoir evaluation. The Qixia Formation dolomite reservoir is thin and contains fractures/cavities, with low po-rosity and low permeability matrix, which were resulted from karstification and multi-stage tectonic movements, making the reservoir evaluation and production capacity prediction difficult. Through the comprehensive analysis of conventional logging, imaging logging, saa seaeeaa mite, calcite, and siliceous rock) and heterogeneous structures were established to facilitated the lithological identification of siliceous dolomite in the Maokou Formation. Based on the fracture/cavity parameters obtained by imaging logging data, Stoneley wave energy attenuation, and NMR pore structure parameters, the quantitative reservoir discrimination criteria and charts were defined. This meth-od was satisfactorily applied in the Lower Permian reservoir in the central Sichuan Basin, with the logging interpretation coincidence rate over 80%, which provides a technical support for the declaration of the Lower Permian natural gas reserves in the central Sich-uan Basin. This method also supports the stereoscopic exploration and finding large-scale reserves and replacement resources in the Gaoshiti-Moxi-Longnusi area of the central Sichuan Basin
Keywords: Central Sichuan Basin; Lower Permian; Fracture-cavity reservoir; Heterogeneity; Lithological identification; Special log ging; Reservoir evaluation; Coincidence rate
2011年以来，四川盆地川中地区高石梯一磨溪区块震旦系一下古生界勘探获得重大突破，与此同时，大量钻井在钻至下二叠统时井见良好油气显示。
2014年后，川中地区下二登统多口井测试获工业气流，证实了川中地区下二叠统具有巨大的勘探潜力。
川中地区下二叠统茅口组、栖霞组岩心、岩屑
基金项目：中国石油西南油气田公司科学研究与技术开发项目“四川地中西部地区下二叠统储层测井评价方法研究”（编号： 20140302-02-03),
第一作者：赵艾球，女，1986年生，工程师，硕士；主要从事测井评价研究工作。地址：（610041）四川省成都市高新区天府大道北段12号，电话：（028）86015497，E-mail:zhaoailin@petrochina.com.cn
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