天然气勘探与开发2025，Vol.48Issue(3)：37-44,8.DOI:10.12055/gaskk.issn.1673-3177.2025.03.004
阿姆河盆地北缘卡洛夫—牛津阶碳酸盐岩下缓坡灰泥丘识别
Identifying lower ramp lime-mud mound in the Callovian-Oxfordian carbonate,northern marginal of Amu Darya Basin,Turkmenistan
摘要
Abstract
Most large-sized bioreef or bioherm present somewhat mound-shaped architectures in seismic reflection.However,for low ramp lime-mud mound reservoirs of the Callovian-Oxfordian carbonate in northern marginal of Amu Darya Basin,such architectures are seismically not only indistinct but difficult to be identified due to small size.Thus,on the basis of core analysis and thin-section identification,and coupled with reflection characteristics of both target and the overlying plastic-deformed evaporates,a semi-quantitative standard was established for the lime-mud mound reservoirs to identify their spatial extension in accordance with seismic data with effect.Results show that(i)mound reservoirs are dominated by clotted limestone,siliceous sponge framework limestone,and bioclastic micritic limestone,indicating them deposited in the poor hydrodynamic setting;(ii)after the deposition of lower carbonate ramp,the generated paleogeomorphology may bring about the overlying evaporates varied in thickness.This variation causes the deformation of"oxeye pattern"when the evaporates are tectonically compressed in later stage;and(iii)the lime-mud mound reservoirs are mainly extended into a certain zone where the evaporates without"oxeye pattern"are overlapped to seismic chaos in the target with the attribute value exceeding 0.4.In conclusion,the lime-mud mound is continuously developed in A1,A2 and A4 wells,and southwest regions,but poorly around A3 well.关键词
土库曼斯坦/阿姆河盆地北缘/卡洛夫—牛津阶/碳酸盐岩岩隆/灰泥丘储层/塑变盐膏层/牛眼构造Key words
Turkmenistan/Northern marginal of Amu Darya Basin/Callovian-Oxfordian/Carbonate buildups/Lime-mud mound reservoir/Plastic-deformed evaporates/Oxeye pattern引用本文复制引用
陈磊,徐乾承,张晓东,王浩..阿姆河盆地北缘卡洛夫—牛津阶碳酸盐岩下缓坡灰泥丘识别[J].天然气勘探与开发,2025,48(3):37-44,8.基金项目
中国石油集团川庆钻探工程有限公司科技项目(编号:CQCDLG-2023-03). （编号:CQCDLG-2023-03）
