摘要
运用三孔隙度测井曲线法、常规测井与阵列声波测井对比法和气测资料与含气相关性解释法等三种综合评价的方法,力求对致密砂岩的含气性和富集规律做出综合正确的评价。通过研究发现,含气层在三孔隙度测井曲线上呈现时差值高而中子值和密度值低的测井响应特征,在SX-006井3~#煤层下砂岩三孔隙度曲线形成一定的包络面积,含气特征明显,综合解释为含气层;通过常规测井曲线和阵列声波测井曲线对比,两者对砂岩含气性的解释呈现明显的一致性,可以用来对比解释砂岩储层的含气特征;柿庄北地区煤层含气性的解释与气测解释相符,而砂岩段与气测资料解释相关性不强;沁水盆地柿庄北区块致密砂岩气富集区总体上呈现NNE向展布,在石炭系的本溪组、太原组和二叠系的山西组、上下石盒子组砂岩含气性较好,尤其以下石盒子组砂岩气最为有利,而山西组也有一定的勘探开发潜力。研究表明柿庄北砂岩层含气显示厚度大、品位中等,含气性较好的层位在埋深1000m左右及更深部。
In this study, three combined evaluation methods, which are three porosity logging curve method, conventional well logging and Array acoustic logging,were used to evaluate the gas content and enrichment rules of tight sandstone. It is found through the study that the gas content presents the characteristics for log response of time different value is high and the neutron and density value is low. The porosity well logging curve for the sandstone of 3# coal seam in SX-006 well makes up certain Env area,the characteristics of contenting gas is obvious,therefore it can be defined as gas bearing seam. Through contrasting of the conventional and array acoustic well logging curves,the explanation shows clear consistency for the gas bearing,so they can be used to explain the gas bearing characteristics for sandstone reservoir. The explanation of gas bearing using coal seam interpretation and Gas interpretation is conforming,while the relationship for the sandstone area using gas interpretation is not strong correlated. The sandstone gas enrichment area presents NNE distribution rules in North Shizhuang area of Qinshui Basin. The gas content is pretty good in Benxi and Taiyuan formations of Carboniferous System,and in Shanxi and up and down Shihezi formations of Permian,especially in the up and down Shihezi formation. It is shown through the study that the gas bearing for sandstone in North Shizhuang area displays the characteristics of thick layers and medium grade. The better layers of gas bearing in tight sandstone locate in the depth of 1000 m or deeper layers.
作者
郑贵强
连会青
杨德方
ZHENG Gui-qiang;LIAN Hui-qing;YANG De-fang(School of Safety Engineering,North China Institute of Science and Technology,Sanhe 065201,China)
出处
《煤炭工程》
北大核心
2018年第12期117-122,共6页
Coal Engineering
基金
十三五"国家重大研发计划项目(2017YFC0804108)
中央基本科研业务费(3142015019)
山东省沉积成矿作用与沉积矿产重点实验室(DMSM2018001)
关键词
沁水盆地
柿庄北地区
致密砂岩
测井评价
含气性
Qinshui Basin
North Shizhuang area
tight sandstone gas
well logging evaluation
gas-containing property
