海相油气地质2025，Vol.30Issue(6)：550-562,13.DOI:10.3969/j.issn.1672-9854.2025.06.002
塔里木盆地富满油田超深断控储集体热液改造效应
Hydrothermal alteration effects on ultra-deep fault-controlled reservoirs in the Fuman Oilfield,Tarim Basin
摘要
Abstract
The fault-controlled carbonate rocks of the Fuman Oilfield in the Tarim Basin have attracted much attention due to the continuous discovery of ultra-deep oil and gas,and there is an urgent need to further clarify the role of hydrothermal fluids in modifying such reservoirs.Based on seismic data interpretation,combined with field outcrop observation,core and thin section analysis,geochemical analysis,and production characteristic analysis,an in-depth study is conducted on the hydrothermal alteration effects on the Ordovician ultra-deep fault-controlled reservoirs in the Fuman Oilfield of the Tarim Basin.The study find that there are three types of hydrothermal alteration effects on the ultra-deep Ordovician reservoirs in the Fuman Oilfield:⑴The dissolution-storage enhancement effect,which develops in an open-semi-open environment.On the one hand,the high temperature of hydrothermal fluids accelerates the chemical reaction rate and promotes mineral dissolution;on the other hand,in the open-semi-open environment,hydrothermal fluids carry the dissolved substances out of the reservoir system,forming good reservoir spaces.(2)The cementation-dissolution synergistic reservoir-controlling effect,which occurs in a closed system with weak late tectonic stress.The coupling of fault activity stages and fluid evolution leads to the upper part being dominated by cementation and filling(enhanced sealing)and the lower part being dominated by dissolution and expansion(improved reservoir performance),forming a dynamic equilibrium structure of"upper blocking and lower storing".(3)The cementation-brittle transformation and fracturing effect,that is,during diagenesis,the cementation caused by hydrothermal fluids enhances the brittleness of the rocks,and subsequent fracturing occurs in the dendritic internal structure of strike-slip faults under the action of tectonic stress or fluid pressure imbalance,forming new reservoirs and enhancing the seepage capacity of the oil reservoir.This study on the alteration effects of ultra-deep hydrothermal fluids on reservoirs in the Fuman Oilfield of the Tarim Basin has deepened the understanding on the mechanism of synergistic reservoir control by hydrothermal fluids and faults,revealed the development law of strong heterogeneity in ultra-deep fault-controlled reservoirs,and further clarified the exploration direction of such reservoirs.关键词
断控储集体/溶蚀增储效应/胶结-溶蚀协同控储效应/胶结-脆变破裂效应/富满油田/塔里木盆地Key words
fault-controlled reservoirs/dissolution-storage enhancement effect/cementation-dissolution synergistic res-ervoir-controlling effect/cementation-brittle transformation and fracturing effect/Fuman Oilfield/Tarim Basin分类
能源科技引用本文复制引用
常少英,赵海涛,张天付,王彭,陈方方,叶婷玉,曹鹏,崔寒驰..塔里木盆地富满油田超深断控储集体热液改造效应[J].海相油气地质,2025,30(6):550-562,13.基金项目
本文受中国石油天然气集团有限公司碳酸盐岩专项课题"碳酸盐岩油气富集规律及有利区带研究"(编号:2023ZZ16-01)、"海相碳酸盐岩油气规模增储上产与勘探开发技术研究"(编号:2023ZZ16YJ02)和中国石油天然气集团有限公司基础性前瞻性重大科技专项"叠合盆地中下组合油气成藏与保持机制研究"(编号:2023ZZ02)联合资助 （编号:2023ZZ16-01）
