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塔里木盆地富滿油田古生界走滑斷裂發(fā)育特征及控圈模式
陳石, 梁鑫鑫, 張銀濤, 謝舟, 黃偉, 宋興國(guó), 陳九洲, 彭梓俊, 楊俊鵬
1 中國(guó)石油大學(xué)( 北京) 油氣資源與工程全國(guó)重點(diǎn)實(shí)驗(yàn)室,,北京 102249 2 中國(guó)石油大學(xué)( 北京) 地球科學(xué)學(xué)院,,北京 102249 3 中國(guó)石油塔里木油田公司,庫(kù)爾勒 841000
Development characteristics of Paleozoic strike-slip fault and its control on traps in Fuman Oilfiled, Tarim Basin
CHEN Shi, LIANG Xinxin, ZHANG Yintao, XIE Zhou, HUANG Wei, SONG Xingguo, CHEN Jiuzhou, PENG Zijun, YANG Junpeng
1 State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum-Beijing, Beijing 102249, China 2 College of Geosciences, China University of Petroleum-Beijing, Beijing 102249, China 3 Tarim Oilfield Company, PetroChina, Korla 841000, China

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摘要? 富滿油田古生界超深層走滑斷控縫洞型油氣藏是塔里木盆地油氣勘探開發(fā)的熱點(diǎn),,但目前對(duì)區(qū)域內(nèi)走滑斷層發(fā)育特征,、演化期次劃分以及相應(yīng)的控圈規(guī)律目前尚缺乏相關(guān)研究,。本文基于富滿油田新采集的三維地震資料,結(jié)合相干和最大似然等平面屬性,,對(duì)走滑斷裂的空間展布特征進(jìn)行了精細(xì)解譯,,并綜合不整合構(gòu)造、斷層交切關(guān)系以及地層沉積特征等,,厘定了走滑斷層的活動(dòng)時(shí)期,,同時(shí)綜合儲(chǔ)集體特征與斷裂空間展布的關(guān)系,對(duì)圈閉的類型和特征進(jìn)行了劃分與總結(jié),。研究表明,,富滿油田三維工區(qū)內(nèi)走滑斷裂平面展布具有典型分區(qū)發(fā)育的特征,可劃分為4 個(gè)變形區(qū),,包括斷裂斜交區(qū),、邊界限制區(qū)、主干斷裂發(fā)育區(qū)以及斷裂弱發(fā)育區(qū),。富滿油田古生界走滑斷裂垂向上由下至上可劃分出3 個(gè)構(gòu)造變形層,,深部構(gòu)造變形層(T?3 之下)、中部構(gòu)造變形層(T?3-TO3t)以及淺部構(gòu)造變形層(TO3t-TP),。深部構(gòu)造變形層中,,基底普遍發(fā)育裂陷結(jié)構(gòu)且走滑斷層活動(dòng)強(qiáng)度較弱;中部構(gòu)造變形層中,,走滑斷裂活動(dòng)強(qiáng)烈,,大部分于奧陶系碳酸鹽巖頂面附近發(fā)育正花狀構(gòu)造;淺部構(gòu)造變形層中,,與走滑斷裂活化相關(guān)的雁列式正斷層廣泛發(fā)育,,垂向上具有分層分布的特征。走滑斷裂的演化過程整體可大致厘定出3 個(gè)主要活動(dòng)期次,,分別為中晚寒武世,、中晚奧陶世以及志留-石炭紀(jì),,其中大部分?jǐn)嗔鸦顒?dòng)終止于中晚奧陶世,,僅有部分晚期活化的大型走滑斷層持續(xù)活動(dòng)至志留-石炭紀(jì)。儲(chǔ)層發(fā)育規(guī)模及位置受斷裂的空間展布特征影響,,在側(cè)向致密基巖和上奧陶統(tǒng)蓋層遮擋下,,組合形成斷控縫洞型圈閉,依據(jù)斷裂平面幾何學(xué)特征可劃分出六類圈閉,,分別為羽狀型,、辮狀型、線性型,、馬尾狀型,、菱形疊接型以及軟連接型,。
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關(guān)鍵詞 : 塔里木盆地,富滿油田,走滑斷裂,分區(qū)發(fā)育,分層變形,分期活動(dòng),斷控縫洞型圈閉
Abstract

The Paleozoic ultra-deep strike-slip fault-controlled fracture-vuggy reservoirs in the Fuman Oilfield represent a focal point for hydrocarbon exploration and development in the Tarim Basin. However, current research on the regional development characteristics, evolutionary phases, and the governing principles of these strike-slip faults remains scarce. In this study, based on newly acquired 3-D seismic data from the Fuman Oilfield, and seismic planar attributes such as coherence and likelihood, we have conducted a refined interpretation of the spatial distribution patterns of the strike-slip faults. By integrating structural features of unconformities, the intersectional relationships of faults, and sedimentological characteristics of the strata, the active periods of the strike-slip faults are clarified. Concurrently, the classification and summary of trap types and their characteristics have been based on the correlation between reservoir attributes and the spatial arrangement of faults. The research reveals that the planar distribution of strike-slip faults across the 3D surveys of the Fuman Oilfield exhibits distinct zonal characteristics, categorizable into four deformation zones: the oblique zone of faults, the boundary-restricted zone, the main fault development zone, and the weak fault development zone. The Paleozoic strike-slip faults within the Fuman Oilfield can be stratified into three structural deformation layers from the deep to shallow: the deep structural deformation layer (below T?3), the middle structural deformation layer (T?3-TO3t), and the shallow structural deformation layer (TO3t-TP). In the deep structural deformation layer, the basement generally exhibits rift structures with weak strike-slip fault activity; in the middle structural deformation layer, strike-slip faulting is intense, with most developing positive flower-like structures near the top surface of the Ordovician carbonate rocks; in the shallow structural deformation layer, en echelon normal faults associated with the reactivation of strike-slip faults are widely developed, and they exhibit a vertically layered distribution characteristic. The evolution of the strike-slip faults can be delineated into three principal phases of activity: the Middle to Late Cambrian, the Middle to Late Ordovician, and the Silurian-Carboniferous. The majority of these faults ceased activity by the Middle to Late Ordovician, with only a few large, later reactivated strike-slip faults remaining active into the Silurian-Carboniferous. The scale and positioning of reservoir development are significantly influenced by the spatial distribution of the faults. Under the sealing of lateral dense bedrock and the Upper Ordovician caprock, fault-controlled fracture-cave traps are formed. Based on the geometric characteristics observed on the fault plane, the traps can be further classified into six distinct types: pinnate, braided, linear, horsetail, diamond superimposed, and soft connection types.

Key words: Tarim Basin; Fuman Oilfield; strike-slip fault; zone development; layered deformation; multi-stage evolution; fault-controlled fracture-vuggy type trap
收稿日期: 2025-02-26 ????
PACS: ? ?
基金資助:國(guó)家自然科學(xué)基金面上項(xiàng)目(42472186) 資助
通訊作者: [email protected]
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陳石, 梁鑫鑫, 張銀濤, 謝舟, 黃偉, 宋興國(guó), 陳九洲, 彭梓俊, 楊俊鵬. 塔里木盆地富滿油田古生界走滑斷裂發(fā)育特征及控圈模式. 石油科學(xué)通報(bào), 2025, 10(01): 1-15 CHEN Shi, LIANG Xinxin, ZHANG Yintao, XIE Zhou, HUANG Wei, SONG Xingguo, CHEN Jiuzhou, PENG Zijun, YANG Junpeng. Development characteristics of Paleozoic strike-slip fault and its control on traps in Fuman Oilfiled, Tarim Basin. Petroleum Science Bulletin, 2025, 10(01): 1-15.
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