西南石油大学学报（自然科学版）2025，Vol.47Issue(4)：51-61,11.DOI:10.11885/j.issn.1674-5086.2023.12.01.01
彬长地区下古生界风化壳岩溶储层特征及分布
Characteristics and Distribution of Lower Paleozoic Weathering Crust Reservoir in Binchang Area
摘要
Abstract
The Lower Paleozoic weathering crust karst reservoir in Binchang Area of southern Ordos Basin has good exploration prospect,which is an important area for achieving petroleum breakthrough and increasing reserves and production in the future.However,the exploration in the area is not adequate,the weathering crust karst reservoir not been systematically studied,and the development characteristics and distribution law of the reservoir unclear.This seriously restricts the further exploration.Based on drilling and seismic data,the development characteristics and the main controlling factors of the weathering crust karst reservoir had been analyzed.In addition,the reservoir development model had been established and its distribution law had been predicted.The research showed that reservoir lithology mainly includs oolitic dolomite,oolitic limestone,slit-fine-grained dolomite and argillaceous dolomite.The reservoir space was dominated by dissolution pores and fractures,and intercrystalline pores could be seen.Paleogeomorphology and faults were the main controlling factors of reservoir development.High-quality reservoirs mainly developed in the dissolved hills where faults developed.Considering the main controlling factors and plane distribution of weathering crust karst reservoir,Binchang area can be divided into four types of reservoir areas.Type Ⅰ was the most favorable area for reservoir development,which related to Caledonian faults and has large distribution.The faults had strong influence on it.The reservoir quality was good.Type Ⅱ was a first-level reservoir development area,which was distributed near the minor strike-slip fault in NW direction.The fracture had little influence on karst and the distribution of karst reservoirs was limited.Type Ⅲ was a relatively developed reservoir area,which was related to Paleozoic fractures and had little influence on karst,and the weathered crust karst reservoirs were scattered.Type Ⅳ was a disadvantageous reservoir area,which was related to the large linear faults formed by the Yanshan-Himalayan tectonic movement.It had a large scale.Due to its location,there was serious denudation and the reservoir quality was poor.关键词
风化壳岩溶储层/主控因素/发育模式/分布规律/下古生界/彬长地区Key words
weathering crust karst reservoir/main controlling factor/development model/distribution law/Lower Paleozoic/Binchang Area分类
能源科技引用本文复制引用
刘玲,冷佳宣,张军涛,杨飞,袁春燕..彬长地区下古生界风化壳岩溶储层特征及分布[J].西南石油大学学报（自然科学版）,2025,47(4):51-61,11.基金项目
中国石化科技部重点攻关项目(P24167) （P24167）
中国科学院A类战略性先导项目(XDA14010201) （XDA14010201）
