摘要
呼和湖凹陷煤层气资源量大,是煤层气勘探开发的有利地区.以钻井、测井和三维地震资料为基础,应用地质统计学反演方法和三维地震蚂蚁体、相干体、曲率体属性分析技术,对呼和湖凹陷大二段3大主力煤层开展煤层厚度、孔隙度、渗透率和裂缝发育特征的平面分布预测,分析了其平面展布特征.研究结果表明：3大煤层大部分都比较发育,单层厚度3～9m;孔隙度的分布特征为1号煤层整体较高,其他两层存在局部高值区;渗透率最发育的是3号煤层;裂缝主要发育在两条大断裂附近,在凹陷中间微裂缝较发育.通过对影响煤层气富集的煤层厚度、构造、储层物性和盖层等多种因素综合分析评价,分别优选了3套煤层的煤层气富集区,为煤层气勘探部署和开采提供了有利目标.
Because of the large coalbed methane resources in Huhehu Sag, so it is the favorable area for CBM ex- ploration and development in the sag. Based on the drilling, well logging and 3 D seismic data, by means of geosta- tistieal inverting method, 3D seismic ant, coherence and curvature attribute analyzing techniques, the predictions of the planar distributions of the thickness, porosity, permeability and fracture development characteristics are con- ducted for the three main coal beds in Member Da-2 of the sag, and moreover the planar spread features of the a- bove are also figured out. The research results show that most of the coal seams stated above are well developed, the individual bed thickness is between 3 m and 9 m; the porosity distribution is characterized by the overall higher porosity for the first coal seam and partially higher porosity for the others; for the permeability, the third coal seam is best developed; the fractures are mainly developed nearby the two bigger fault fractures, while the micro-frac- tures are developed in the middle of the sag. Through the comprehensive analysis and evaluation of multiple influ- encing factors for the thickness, structures, physical properties, cap rocks and so on of the CBM enriched reser- voirs, three sets of the CBM enriched layer are preferred and selected. Thus the favorable targets for the exploration deployment and exploitation of the coalbed methane are presented.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2014年第3期164-169,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重大科技专项“煤层气富集规律研究及有利区块预测评价”(2010E-2201)
