合川-潼南地区茅一段泥灰岩储集空间测井定量评价方法  

Quantitative logging evaluation method for accumulation space of marlstone reservoir in Member Mao-1 in Hechuan-Tongnan area

作　　者：李宏斌 金雪英[2] 夏文豪 王雪萍[2] 俞萱[2] LI Hongbin;JIN Xueying;XIA Wenhao;WANG Xueping;YU Xuan(Development Department of PetroChina Daqing Oilfield Co Ltd,Daqing 163453,China;Exploration and Development Research Institute of PetroChina Daqing Oilfield Co Ltd,Daqing 163712,China)

机构地区：[1]中国石油大庆油田有限责任公司开发事业部,黑龙江大庆163453 [2]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2023年第2期123-132,共10页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重大科技专项“深层油气储集层形成机理与分布规律”(2018A-0103)。

摘　　要：合川-潼南地区茅一段泥灰岩储层纳米孔缝发育,储集空间类型复杂,传统基于岩心实验评价孔隙构成的方法耗时、覆盖率低且成本高。为了准确、连续地评价该类储层的储集空间构成,以岩心实验结果为基础,将储层中的储集空间进行分类,通过研究不同类型孔隙在元素、核磁等特殊测井中响应特征,构建储层岩石物理模型,建立了有机质孔、黏土矿物孔等不同类型的纳米级孔隙测井定量评价方法,并对各类储集空间的贡献及有效性进行分析。结果表明:茅一段泥灰岩储集空间分为有机质孔、脆性矿物孔、黏土矿物孔和裂缝4种类型;茅一段泥灰岩以脆性矿物孔和黏土矿物孔为主,其中黏土矿物孔对有效孔隙度几乎无贡献;有机质孔与总有机碳含量具有相关性,对总孔隙度有一定贡献;裂缝对总孔隙度贡献小,但对渗透率贡献较大。研究成果对同类泥灰岩储层资源潜力评价具有指导意义。The marlstone reservoir of Member Mao-1 in Hechuan-Tongnan area develops nano-scale pores and fractures,with complex accumulation space types.Conventional method based on core experiments is time-consuming,low in coverage and high in cost.In order to accurately and continuously evaluate accumulation space composition,based on core experimental data,accumulation spaces are divided into 4 types.By studying response characteristics of different types of pores in special logging such as ECS and NMR and building reservoir petrophysical model,quantitative logging evaluation method is established for different types of nano-pores such as organic matter-hosted pores,clay mineral pores,etc.,and contribution and effectiveness of various pores are analyzed.The results show 4 types of accumulation space in Member Mao-1 marlstone reservoir including organic matter-hosted pores,brittle mineral pores,clay mineral pores and fractures.The pores in Member Mao-1 are mainly brittle mineral pores and clay mineral pores,of which clay mineral pores generally do not contribute to effective porosity.Organic matterhosted pores are related to TOC and have a certain contribution to total porosity.Fractures have less contribution to total porosity,but more contribution to permeability.The research has guidance significance for resources potential evaluation of similar marlstone reservoirs.

关 键 词：合川-潼南地区 茅一段 泥灰岩 储集空间 定量评价 有机质孔 特殊测井 

分 类 号：TE122.24[石油与天然气工程—油气勘探] P931[天文地球—自然地理学]