页岩储层非均质性分析——以四川长宁地区下志留统龙马溪组为例

Research of shale reservoir heterogeneity: a case of Lower Silurian Longmaxi Formationin Changning Area, Sichuan Basin

 曾靖珂 2 潘仁芳 2 金晓凡 2 杨宝刚 2 鄢杰 2

长江大学地球科学学院，湖北 武汉 430100 长江大学油气资源与勘查技术教育部重点实验室，湖北 武汉 430100）

School of Geosciences, Yangtze University, Wuhan 430100, China MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China)

 页岩储层有别于常规储层，低孔低渗的特性决定了其储层非均质的复杂性。国内针对页岩储层非均质特征评价工作开展的还相对较少，目前没有完善的评价标准。在详细调研国内外储层非均质性研究的基础上，文中分别从平面、层内、微观3个方面对有机质体积分数、成熟度、孔隙度、矿物组分的非均质性特征进行对比研究，并根据研究结果做出相应分析。分析结果表明：四川盆地长宁区块下志留统龙马溪组页岩储层纵、横向上非均质特征均明显，夹层发育，热成熟度高，镜质体反射率（Ro）达3.8%；石英等脆性矿物体积分数高，孔隙、微裂隙发育且配置好，页岩储层物性好，勘探开发潜力大。

Different from conventional reservoir, shale reservoirs, with low porosity and permeability, have complex inhomogeneous properties. The evaluation of shale gas reservoir heterogeneity characteristics in China is still relatively rare, and there is not an evaluation standard. Based on the detailed investigation and research in China and abroad, the organic matter content, maturity, porosity and mineral composition heterogeneity were studied from areal, inlayer and micro-pore scales, and the corresponding analysis according to the results of the study was made. The analysis shows that Lower Silurian Longmaxi Formation shale reservoirs in Changning Area, Sichuan Basin have such characteristics as obvious longitudinal and horizontal heterogeneity, developed interlayer, high quartz and other brittle high mineral contents, thermal maturity, near to 3.8% Ro, configured pore and micro fractures, good shale reservoir property, and great exploration and development potential.

10.6056/dkyqt201602003