本文關(guān)鍵詞： 有效斷接厚度 斷-蓋耦合 控藏作用 遼中南洼 旅大A油田　出處：《斷塊油氣田》2017年02期 　論文類型：期刊論文

【摘要】：為弄清遼中凹陷南次洼西斜坡的油氣分布規(guī)律,利用三維地震數(shù)據(jù)和鉆井資料,對旅大A油田的蓋層與油源斷裂發(fā)育特征進行系統(tǒng)研究,從而明確了研究區(qū)斷-蓋耦合類型及其對油氣成藏的控制作用。研究結(jié)果表明,研究區(qū)不同構(gòu)造斷-蓋耦合類型差異懸殊,斷-蓋耦合關(guān)系對油氣富集層系具有明顯控制作用。其中:北部A-1構(gòu)造斷-蓋耦合類型為封閉型,油源斷裂與蓋層耦合關(guān)系較好,有效斷接厚度較大(278 m),大于有效斷接厚度封油的臨界值(100~150 m),油氣被完全封蓋在蓋層之下的東三段儲層;而南部A-2構(gòu)造斷-蓋耦合類型為半封閉型,油源斷裂與蓋層耦合關(guān)系差,有效斷接厚度小(98 m),部分油氣沿油源斷裂垂向運移,在蓋層之上的東一段和東二上亞段儲層富集。
[Abstract]:In order to understand the oil and gas distribution law of the west slope of Nanziwa in Liaozhong sag, the development characteristics of caprock and oil source faults in Lida A oilfield are systematically studied by using 3D seismic data and drilling data. Thus, the types of fault-cap coupling and their controlling effect on hydrocarbon accumulation in the study area are clarified. The results show that there are great differences in the types of fault-cap coupling between different structures in the study area. The coupling relationship between fault and cap has obvious controlling effect on oil-gas enrichment strata, among which the type of fault-cap coupling of A-1 structure in the north is closed, and the coupling relationship between oil source faults and caprocks is good. The thickness of effective fracture is larger than 278mW, which is larger than the critical value of sealing oil with effective fracture thickness of 150mg, and oil and gas are completely capped in the reservoir of the third member of the east under the caprock, while the type of fault-cap coupling of the southern A-2 structure is semi-closed, and the coupling relationship between oil source faults and caprocks is poor. The effective fault thickness is less than 98 m, and some oil and gas are migrated vertically along the oil source fault, and are enriched in the east first member and the east second upper submember above the caprock.
【作者單位】： 中海石油(中國)有限公司天津分公司;
【基金】：國家科技重大專項專題“渤海海域大中型油氣田地質(zhì)特征”(2011ZX05023-006-002)
【分類號】：P618.13

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