涪陵地区页岩含气量计算模型及应用

发布时间：2018-06-24 11:27

本文选题：涪陵 + 页岩含气量　；参考：《地球科学》2017年07期

【摘要】：目前页岩含气量的预测获取方法主要包括现场解吸法、测井解释法、等温吸附法、线性拟合法以及地震反演法等,但每种方法都存在不足,因此研制了涪陵地区页岩含气量计算模型,为页岩资源量评价奠定基础.以岩心实验为基础,筛选并分析了研究区页岩游离气含量和吸附气含量的主控参数,分别建立了游离气含量和吸附气含量的计算模型,最终利用该模型得到了研究区页岩含气量与孔隙度、TOC和深度的演化图版以及单井页岩含气量分布特征.当孔隙度和TOC一定时,页岩含气量随深度的增加而增加,但是增加幅度逐渐降低;当深度一定时,页岩含气量随孔隙度和TOC的增大而增加.A井五峰组-龙马溪组页岩气储层含气量呈现"上低下高"且随深度的增加而明显增加的特征;其中下部Ⅰ段储层段,总含气量高达7.76m~3/t,游离气含量占60.57%,为优质层段.
[Abstract]:At present, the prediction and acquisition methods of shale gas content mainly include field desorption method, logging interpretation method, isothermal adsorption method, linear fitting method and seismic inversion method, etc. Therefore, a calculation model of shale gas content in Fuling area is developed, which lays a foundation for shale resource evaluation. Based on core experiments, the main control parameters of free gas content and adsorption gas content of shale in the study area were screened and analyzed, and the calculation models of free gas content and adsorption gas content were established respectively. Finally, the evolution chart of gas content and porosity TOC and depth of shale in the study area and the distribution characteristics of gas content in single well shale are obtained by using this model. When the porosity and TOC are constant, the shale gas content increases with the increase of depth, but decreases gradually, and when the depth is constant, Shale gas content increases with the increase of porosity and TOC. The gas content of shale gas reservoir of Wufeng formation and Longmaxi formation of well A is "low and high" and increases obviously with the increase of depth. The total gas content is as high as 7.76 mm2 / t, and the free gas content is 60.57%, which is a high quality layer.
【作者单位】：中国地质大学资源学院;中国地质大学构造与油气资源教育部重点实验室;中石化江汉油田分公司勘探开发研究院;
【基金】：中国地质调查局油气基础性公益性地质调查项目(No.DD20160185) 国家重大油气专项(No.2016ZX05034-002-003) 国家自然科学基金项目(No.41672134) 国家基础地质调查项目(No.12120114055801) 高等学校创新引智计划(No.B14031)
【分类号】：P618.13

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