高校地质学报
高校地質學報
고교지질학보
GEOLOGICAL JOURNAL OF CHINA UNIVERSITIES
2014年
4期
602-610
,共9页
张新顺%黄志龙%范彩伟%吴红烛
張新順%黃誌龍%範綵偉%吳紅燭
장신순%황지룡%범채위%오홍충
定量颗粒荧光%含油气性%储层%运聚模式%宝岛北斜坡%琼东南盆地
定量顆粒熒光%含油氣性%儲層%運聚模式%寶島北斜坡%瓊東南盆地
정량과립형광%함유기성%저층%운취모식%보도북사파%경동남분지
quantitative grain fluorescence%oil-gas-bearing possibility%reservoir rock%accumulation model%Baodao northern slope%Qiongdongnan Basin
基于琼东南盆地宝岛北斜坡近几年的勘探资料和前人研究成果,通过对该区已钻遇主要目的储层的定量颗粒荧光等实验分析,结合油气地化特征、断层活动规律等,探讨研究区油气分布特征和运聚模式。结果表明:宝岛北斜坡主要目的层三亚组储层属于中孔低渗储层,泥质含量高,储层非均质性较强;该储层普遍含气,油气藏形成时间晚,储层颗粒表面吸附烃类普遍较高,颗粒内烃类含量非常低;而靠近凹陷的深层陵水组油气藏形成时间早,但后期遭受破坏,储层颗粒表面吸附烃类普遍较低,颗粒内烃类含量较高;宝岛凹陷生成油气向北运移能力有限,主要向靠近凹陷的宝岛B区供烃,对松涛凸起以北的宝岛A区油气贡献小;宝岛A区油气主要为其下覆渐新统海相烃源岩所生油气,通过广泛发育的断层垂向运移而形成的,成藏时间晚,油气性质与其他地区差异明显。
基于瓊東南盆地寶島北斜坡近幾年的勘探資料和前人研究成果,通過對該區已鑽遇主要目的儲層的定量顆粒熒光等實驗分析,結閤油氣地化特徵、斷層活動規律等,探討研究區油氣分佈特徵和運聚模式。結果錶明:寶島北斜坡主要目的層三亞組儲層屬于中孔低滲儲層,泥質含量高,儲層非均質性較彊;該儲層普遍含氣,油氣藏形成時間晚,儲層顆粒錶麵吸附烴類普遍較高,顆粒內烴類含量非常低;而靠近凹陷的深層陵水組油氣藏形成時間早,但後期遭受破壞,儲層顆粒錶麵吸附烴類普遍較低,顆粒內烴類含量較高;寶島凹陷生成油氣嚮北運移能力有限,主要嚮靠近凹陷的寶島B區供烴,對鬆濤凸起以北的寶島A區油氣貢獻小;寶島A區油氣主要為其下覆漸新統海相烴源巖所生油氣,通過廣汎髮育的斷層垂嚮運移而形成的,成藏時間晚,油氣性質與其他地區差異明顯。
기우경동남분지보도북사파근궤년적감탐자료화전인연구성과,통과대해구이찬우주요목적저층적정량과립형광등실험분석,결합유기지화특정、단층활동규률등,탐토연구구유기분포특정화운취모식。결과표명:보도북사파주요목적층삼아조저층속우중공저삼저층,니질함량고,저층비균질성교강;해저층보편함기,유기장형성시간만,저층과립표면흡부경류보편교고,과립내경류함량비상저;이고근요함적심층릉수조유기장형성시간조,단후기조수파배,저층과립표면흡부경류보편교저,과립내경류함량교고;보도요함생성유기향북운이능력유한,주요향고근요함적보도B구공경,대송도철기이북적보도A구유기공헌소;보도A구유기주요위기하복점신통해상경원암소생유기,통과엄범발육적단층수향운이이형성적,성장시간만,유기성질여기타지구차이명현。
Based on the recent oil and gas exploration data of Baodao northern slope in the Qiongdongnan Basin and the analyses of target reservoir rocks of the Baodao northern slope, the oil-gas-bearing possibility was evaluated by quantitative grain fluorescence experiments. In combination with oil-gas charging time, stages of fault activity and some other geological background, oil-gas distribution characteristics of Baodao northern slope were analyzed. The results show that the target reservoir, i.e., the Sanya Formation, belongs to mid porosity and low permeability reservoir. Also, the pores are mainly intergranular and biological visceral pores, and the reservoir shows strong heterogeneity with high mud content. The oil and gas reservoirs of the Sanya Formation of Baodao northern slope formed very late. So the particle surface adsorbed hydrocarbon abundance of shallow Sanya Formation is prevalent high with low abundance of intragranular hydrocarbon. However, the oil and gas reservoirs of the Lingshui Formation, close to the Baodao sag, formed much earlier, but most of them were destroyed later. Therefore the particles of reservoirs have high abundance of intragranular hydrocarbon with low adsorbed hydrocarbon abundance. Because of the limited migration ability, the oil and gas generated from the Baodao Sag is mainly influenced the B area of Baodao northern slope and they have little contribution to the A area of Baodao northern slope, which is located at the northern part of the Songtao bulge. Through the widely developed faults, the oil and gas generated by the Oligocene source rock migrated vertically and accumulated in the reservoir of the Sanya Formation very late. And the characteristics of the oil and gas are different from those of the oil and gas from other areas.