石化技术
石化技術
석화기술
PETROCHEMICAL INDUSTRY TECHNOLOGY
2015年
2期
121-123
,共3页
中生界%成藏模式%源下成藏%富林洼陷
中生界%成藏模式%源下成藏%富林窪陷
중생계%성장모식%원하성장%부림와함
Mesozoic%accumulation models%accumulation under the source%Fulin Sag
富林洼陷中生界经历多期次构造运动及构造反转过程，地层遭受多期强烈剥蚀，火山活动频繁，导致本地区中生界地层与构造发育情况复杂，储层岩性多样，勘探程度较低。为明确油气成藏规律以指导中生界的勘探，首先从油源条件入手明确富林洼陷中生界为新生古储型油藏，之后在物性统计的基础上研究不同岩性和风化壳及断层导致的储层非均质性，明确了风化壳和断层附近的凝灰岩和砂岩为有利储层，最后从本地区中生界油藏的现今分布于不整合和断层附近的特征出发，结合中生界地层压力没有异常高压的研究结果，明确了不整合与断裂、微裂缝体系是中生界油藏形成的的主要运移聚集条件。在成藏规律研究的基础上根据油气藏与烃源岩的空间展布关系及油气运移特征的不同，提出了源上成藏模式，源侧成藏模式，源下成藏模式以指导中生界的油气勘探。对富林洼陷中生界油气成藏规律提供了新的思路，丰富了油气成藏模式的类型。
富林窪陷中生界經歷多期次構造運動及構造反轉過程，地層遭受多期彊烈剝蝕，火山活動頻繁，導緻本地區中生界地層與構造髮育情況複雜，儲層巖性多樣，勘探程度較低。為明確油氣成藏規律以指導中生界的勘探，首先從油源條件入手明確富林窪陷中生界為新生古儲型油藏，之後在物性統計的基礎上研究不同巖性和風化殼及斷層導緻的儲層非均質性，明確瞭風化殼和斷層附近的凝灰巖和砂巖為有利儲層，最後從本地區中生界油藏的現今分佈于不整閤和斷層附近的特徵齣髮，結閤中生界地層壓力沒有異常高壓的研究結果，明確瞭不整閤與斷裂、微裂縫體繫是中生界油藏形成的的主要運移聚集條件。在成藏規律研究的基礎上根據油氣藏與烴源巖的空間展佈關繫及油氣運移特徵的不同，提齣瞭源上成藏模式，源側成藏模式，源下成藏模式以指導中生界的油氣勘探。對富林窪陷中生界油氣成藏規律提供瞭新的思路，豐富瞭油氣成藏模式的類型。
부림와함중생계경력다기차구조운동급구조반전과정，지층조수다기강렬박식，화산활동빈번，도치본지구중생계지층여구조발육정황복잡，저층암성다양，감탐정도교저。위명학유기성장규률이지도중생계적감탐，수선종유원조건입수명학부림와함중생계위신생고저형유장，지후재물성통계적기출상연구불동암성화풍화각급단층도치적저층비균질성，명학료풍화각화단층부근적응회암화사암위유리저층，최후종본지구중생계유장적현금분포우불정합화단층부근적특정출발，결합중생계지층압력몰유이상고압적연구결과，명학료불정합여단렬、미렬봉체계시중생계유장형성적적주요운이취집조건。재성장규률연구적기출상근거유기장여경원암적공간전포관계급유기운이특정적불동，제출료원상성장모식，원측성장모식，원하성장모식이지도중생계적유기감탐。대부림와함중생계유기성장규률제공료신적사로，봉부료유기성장모식적류형。
Multi-stages tectonic movements, tectonic inversion, intense denudation and the frequent volcano activity made the sophistication of Mesozoic strata and structures, the variety of lithology and the low degree of prospecting in Fulin Sag.In order to identify the law of oil and gas accumulation, firstly we distinguish the type of Mesozoic reservoirs in Fulin Sag is “ new bed-generating and old bed-storing oil reservoirs “ by the analysis of oil source condition; secondly, based on the statistical study of physical properties, the reservoir heterogeneity is definitely caused by the various lithology, weathering crust and faults, and we realize the weathering crust and tuff and sandstone near the faults are the favorable reservoirs;and finally, started from the characteristic, which is the Mesozoic reservoirs located near the unconformity and faults, combined with the results that there is no abnormal high pressure in Mesozoic, we detect that the unconformity, faults and microcrack system are the main migration pathways of Mesozoic oil reservoirs.Based on the research of the law of hydrocarbon accumulation, according to the differences of spatial extension of reservoir and source rock respectively, and the differentiation in the characteristics of hydrocarbon migration, we propose the accumulation model, including “above the source”, “beside the source” and “under the source” to conduct the hydrocarbon exploration in Mesozoic. All this above will provide a new thinking for the study of the law of oil accumulation, and enrich the model of oil accumulation inFulin Sag.
