Fluid migration paths in the marine strata of typical structures in the western Hubei-eastern Chongq

来源 :Petroleum Science | 被引量 : 0次 | 上传用户:yanqingqing1213
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The western Hubei-eastern Chongqing area is an important prospective zone for oil and gas exploration in the central Yangtze area. Three representative structures, the Xinchang structure, Longjuba gas-bearing structure and the Jiannan gas field, were selected to analyze biomarker parameters in marine strata and to examine various types of natural gas and hydrocarbon sources. Fluid inclusions; carbon, oxygen, and strontium isotopic characteristics; organic geochemical analysis and simulation of hydrocarbon generation and expulsion history of source rocks were used for tracing fluid migration paths in marine strata of the study area. The Carboniferous-Triassic reservoirs in three typical structures all experienced at least two stages of fluid accumulation. All marine strata above the early Permian were shown to have fluids originating in the Permian rocks, which differed from the late stage fluids. The fluids accumulated in the late Permian reservoirs of the Xinchang structure were Cambrian fluids, while those in the late Carboniferous reservoirs were sourced from a combination of Silurian and Cambrian fluids. A long-distance and large-scale cross-formational flow of fluids destroyed the preservation conditions of earlier accumulated hydrocarbons. A short-distance cross-formational accumulation of Silurian fluids was shown in the late Permian reservoirs of the Longjuba structure with favorable hydrocarbon preservation conditions. The fluid accumulation in the Carboniferous reservoirs of the Jiannan structure mainly originated from neighboring Silurian strata with a small amount from the Cambrian strata. As a result, the Jiannan structure was determined to have the best preservation conditions of the three. Comparative analysis of fluid migration paths in the three structures revealed that the zone with a weaker late tectonism and no superimposition and modification of the Upper and Lower Paleozoic fluids or the Upper Paleozoic zone with the fluid charging from the Lower Paleozoic in the western Hubei-eastern Chongqing area are important target areas for future exploration. The western Hubei-eastern Chongqing area is an important prospective zone for oil and gas exploration in the central Yangtze area. Three representative structures, the Xinchang structure, Longjuba gas-bearing structure and the Jiannan gas field, were selected to analyze biomarker parameters in marine strata and to examine various types of natural gas and hydrocarbon sources. Fluid inclusions; carbon, oxygen, and strontium isotopic characteristics; organic geochemical analysis and simulation of hydrocarbon generation and expulsion history of source rocks were used for tracing fluid migration paths in marine strata of The study area. The Carboniferous-Triassic reservoirs in three typical structures all experienced at least two stages of fluid accumulation. All marine strata above the early Permian were shown to have the origin of the Permian rocks, which differed from the late stage fluids. The types of deposits in the late Permian reservoirs of the Xinchang structure were Cambr ian fluids, while those in the late Carboniferous reservoirs were sourced from a combination of Silurian and Cambrian fluids. A long-distance and large-scale cross-formational flow of fluids destroyed the preservation conditions of earlier accumulated hydrocarbons. A short-distance cross- formational accumulation of Silurian fluids was shown in the late Permian reservoirs of the Longjuba structure with favorable hydrocarbon preservation conditions. The fluid accumulation in the Carboniferous reservoirs of the Jiannan structure mainly originated from neighboring Silurian strata with a small amount of the Cambrian strata. As a result, the Jiannan structure was determined to have the best preservation conditions of the three. comparative analysis of fluid migration paths in the three structures revealed that the zone with a weaker late tectonism and no superimposition and modification of the Upper and Lower Paleozoic fluids or the Upper Paleozoic zone with the fluid charging from the Lower Paleozoic in the western Hubei-eastern Chongqing area are important target areas for future exploration.
其他文献
目的:探讨预见性护理干预在提高小儿静脉留置针穿刺成功率中的作用.方法:选取2014年10月一2015年9月来我科输液的120倒患儿,随机分成观察组和对照组,对观察组60例患儿进行预
目的:观察并讨论护理干预在小儿肺炎合并心力衰竭的临床护理疗效.方法:选取2013年5月~2015年9月来我院治疗的96例肺炎合并心力衰竭患儿实施回顾性分析,随机分成两组.给予对照
目的:观察并讨论针对性护理在小儿肺炎护理中的临床护理疗效.方法:选取2012年10月~2015年10月来我院治疗的100例小儿肺炎患儿实施回顾性分析,随机分成两组.给予对照组患儿临
很多文章只强调了血管紧张素转换酶抑制剂治疗高血压和严重心衰的有益的血流动力学作用,而对钾的内环境稳定的影响则报道甚少。作者报道2例充血性心衰患者,因服用巯甲丙脯酸
目的:探讨护理干预措施对于癌症患者的护理效果.方法:对照组:对该组病患者给予常规的护理,包括了药物护理、心理护理以及健康教育护理.观察组:对该组病患者采取了常规护理与
目的:探讨综合护理在子宫肌瘤围手术期的护理方法 和效果;方法;选择我院2014年1月至2015年1月收治的子宫肌瘤患者80例,将全部患者随机分成实验组和对照组各40例,对照组患者给
目的:观察和分析静脉注射泵在心血管患者的治疗中的应用效果和护理方法 .方法:选取2014年5月~2015年5月在本院治疗的78例心血管疾病患者,全部使用静脉注射泵进行治疗,观察患
重症肌无力可采用胸腺切除治疗获得效果,但有些难治病例往往效果不佳,近有应用两次过滤血浆置换疗法(double filtration plasmaphersis,DFP)。作者报告1例应用 DFP 治疗的经
对于危重症患者采取舒适护理,能明显的减轻患者恐惧、焦虑以及抑郁等症状,降低医患纠纷概率,患者满意度提高,同时有助于患者护理质量的提升.本文主要对危重症患者护理中舒适