海相油气地质2024，Vol.29Issue(1)：71-80,10.DOI:10.3969/j.issn.1672-9854.2024.01.006
鹤峰地区中上二叠统海相页岩储层非均质性特征——以HD1井为例
The heterogeneity characteristics of marine shale reservoirs of Middle-Upper Permian in Hefeng area:a case study of the Well HD1
摘要
Abstract
Permian marine shale is widely distributed in Hefeng area,western Hunan-Hubei fold belt.It is rich in organic matter and is a set of high-quality source rock.Compared with the shale gas of Niutitang Formation and Wufeng Formation-Longmaxi Formation,the research degree of marine shale gas of Middle-Upper Permian is relatively low.Survey well HD1 reveals the reservoir characteristics of the Gufeng-Dalong shale of Middle-Upper Permian and its gas-bearing properties in the core of Chenjiawan anticline,Hefeng area.So taking the Well HD1 as the research target,analysis of organic geochemistry and data of X-ray diffraction whole rock mineral,SEM,high pressure mercury intrusion,isothermal adsorption and on-site experimental permit to characterize the marine shale heterogeneity of Gufeng Formation-Dalong Formation in Middle-Upper Permian in Hefeng area.The results show that four types of lithofacies are developed in Gufeng-Dalong marine shale as siliceous shale facies,mixed shale facies,calcareous shale facies and clay shale facies.Controlled by lithofacies,the linear density of fracture diversities among different lithofacies,and the micro pore-fracture structures of different types and scales are developed.Siliceous shale in the lower part of Dalong Formation and Gufeng Formation has high organic carbon content,large specific surface area and total pore volume.The differential,onrush and variation coefficient of permeability show that the heterogeneity of mixed and calcareous lithofacies in Dalong Formation is weak,while that of siliceous lithofacies is strong.Different types of lithofacies in Xiayao Formation and Gufeng Formation show strong heterogeneity.The heterogeneity of gas generation capacity and reservoir capacity result in the gas content having the characteristics of strong heterogeneity in different lithofacies.In general,the shale layers with high organic carbon content,relatively well developed brittle minerals,natural macro fractures,micro organic pores and micro fractures in minerals,with good reservoir physical properties and high gas content are all siliceous shale facies,and located in the bottom part of Dalong Formation and Gufeng Formation.关键词
海相页岩/岩石相/非均质性/HD1井/中上二叠统/鹤峰地区Key words
marine shale/lithofacies/heterogeneity/Well HD1/Middle-Upper Permian/Hefeng area分类
能源科技引用本文复制引用
姜生玲,彭传圣,周庆华,张立原,胡晓兰,洪克岩,朱亮亮..鹤峰地区中上二叠统海相页岩储层非均质性特征——以HD1井为例[J].海相油气地质,2024,29(1):71-80,10.基金项目
本文受甘肃省自然科学基金项目"鄂尔多斯盆地陇东地区三叠系延长组页岩储层评价及油气共生关系研究"(编号:22JR5RM202)、甘肃省教育科技创新项目"甘肃省中小型盆地页岩气资源潜力评价研究"(编号:2022B-218)、庆阳市青年科技基金项目"鄂尔多斯盆地陇东地区延长组页岩油气含率及其主控因素研究"(编号:QY-STK-2022A-019)、陇东学院2020博士基金计划项目"湘鄂西复杂构造区下寒武统牛蹄塘组页岩气富集条件及主控因素研究"(编号:XYBY202012)联合资助 （编号:22JR5RM202）
