吐哈盆地石油地质条件、资源潜力及勘探方向
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摘要
通过对吐哈盆地生储盖组合配置、成藏模式等石油地质条件的综合研究,认为吐哈盆地主要发育侏罗系西山窑组、八道湾组煤系烃源岩,以及二叠系桃东沟群湖相烃源岩,这2套烃源岩生油强度较大的地区均位于台北凹陷主体沉降区,具备形成大油田的烃源基础。盆地主要发育侏罗系、三叠系和二叠系等3套储层,侏罗系储层主要为辫状河三角洲分流河道粗砂岩,二叠系梧桐沟组、三叠系克拉玛依组储层主要为扇三角洲、辫状河三角洲前缘水下分流河道的细砂岩、砂砾岩。侏罗系主要有正向分异、逆向分异、垂向分异及混合型等4种成藏模式;二叠系为侧向长距离运聚-古斜坡成藏模式;三叠系为源内垂向运聚-自生自储油气成藏模式。采用类比法、统计法、成因法及特尔菲加权法综合得到吐哈盆地常规石油地质资源量为10.09×10~8t,剩余资源量为6.07×10~8t。通过地质评价、原油剩余资源量和剩余资源丰度的分布预测,提出了鄯善弧形带、鲁克沁—红连带、西部弧形带3个勘探方向及有利目标区。
Based on the systematic study of petroleum geological condition, such as source-reservoir-cap assemblage and reservoir-forming pattern in Turpan-Hami Basin, it is considered that the source rocks are mainly coal-bearing source rocks of Jurassic Xishanyao Formation and Badaowan Formation, and lacustrine source rocks of Permian Taodonggou Group. These two sets of source rocks with high hydrocarbon-generating intensity are located in the main subsidence area of Taipei Sag,and have the source conditions for forming large-scale oil field. Of the three sets of reservoirs, Jurassic reservoirs are mainly coarse sandstone of braided river delta distributary channel, the reservoirs of Permian Wutonggou Formation and Triassic Karamay Formation are mainly sandstone and conglomerate of the subaqueous distributary channels in the fan delta and braided river delta front. According to main factors controlling hydrocarbon accumulation, four types of accumulation patterns are classified in Jurassic: forward differentiation, reverse differentiation, vertical differentiation and mixed pattern. The Permian hydrocarbons accumulate in pattern of lateral long-distance and trapping in paleoslope. The Triassic hydrocarbons accumulate in pattern of vertical migration and self-generation and self-storaging in source rocks. By using analogy, statistics, genesis and Delphi weighting method, it is calculated out that the amounts of conventional petroleum resources and the remaining resources are 10.09×10~8 t and 6.07×10~8 t, respectively. Through evaluating geological conditions, predicting remaining resource distribution, three exploration directions and favorable target areas of Shanshan arc play, Lukeqin-honglian play and western arc play are proposed.
Based on the systematic study of petroleum geological condition, such as source-reservoir-cap assemblage and reservoir-forming pattern in Turpan-Hami Basin, it is considered that the source rocks are mainly coal-bearing source rocks of Jurassic Xishanyao Formation and Badaowan Formation, and lacustrine source rocks of Permian Taodonggou Group. These two sets of source rocks with high hydrocarbon-generating intensity are located in the main subsidence area of Taipei Sag,and have the source conditions for forming large-scale oil field. Of the three sets of reservoirs, Jurassic reservoirs are mainly coarse sandstone of braided river delta distributary channel, the reservoirs of Permian Wutonggou Formation and Triassic Karamay Formation are mainly sandstone and conglomerate of the subaqueous distributary channels in the fan delta and braided river delta front. According to main factors controlling hydrocarbon accumulation, four types of accumulation patterns are classified in Jurassic: forward differentiation, reverse differentiation, vertical differentiation and mixed pattern. The Permian hydrocarbons accumulate in pattern of lateral long-distance and trapping in paleoslope. The Triassic hydrocarbons accumulate in pattern of vertical migration and self-generation and self-storaging in source rocks. By using analogy, statistics, genesis and Delphi weighting method, it is calculated out that the amounts of conventional petroleum resources and the remaining resources are 10.09×10~8 t and 6.07×10~8 t, respectively. Through evaluating geological conditions, predicting remaining resource distribution, three exploration directions and favorable target areas of Shanshan arc play, Lukeqin-honglian play and western arc play are proposed.
引文
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[15]苟红光,赵莉莉,梁桂宾,等. EUR分级类比法在致密油资源评价中的应用:以三塘湖盆地芦草沟组为例[J].岩性油气藏,2016,28(3):27-33.
[16]张品,苟红光,龙飞,等.吐哈盆地天然气地质条件、资源潜力及勘探方向[J].天然气地球科学,2018,29(10):1531-1541.
[17]吕学菊,邹辰,黄兄,等.统计法在苏北盆地曲塘次凹古近系石油资源评价中的应用[J].地质学刊,2016,40(3):463-468.
[18]张建良,孔祥礼.油田(藏)规模序列法在复杂断块老油田滚动勘探开发中的应用[J].断块油气田,2001,8(6):32-34.
[2]白国娟.鲁克沁北一区二叠系梧桐沟组储层特征及其对注水开发的影响[J].新疆石油天然气,2017,13(2):10-14,26.
[3]贺永红,王志勇,李新宁. BASIMS4.5盆地模拟软件在吐哈盆地的应用[J].吐哈油气,2002,7(3):286-288.
[4]苏传国,俞中华,金颖,等.吐哈盆地石油经济系数的求取[J].吐哈油气,2003,8(4):324-326.
[5]汲国庭.鲁克沁稠油油藏泡沫驱扩大试验区方案优化[D].成都:成都理工大学,2017:6-8.
[6]徐论勋,李建民,李景义.吐哈盆地台北凹陷侏罗系烃源岩特征[J].江汉石油学院学报,2004,26(2):13-14.
[7]丛智.吐哈油田鲁克沁东区梧桐沟组储层特征研究[D].大庆:东北石油大学,2015:1-56.
[8]李逸群,鞠传学,张宪国.鲁克沁构造带克拉玛依组沉积模式及储层特征[J].内蒙古石油化工,2016(3):128-131.
[9]王海学.吐哈盆地台南凹陷前侏罗系不同构造带油气成藏规律研究[D].大庆:东北石油大学,2015:1-95.
[10]李俊翔.吐哈盆地火焰山地区前侏罗系构造特征与储层预测研究[D].成都:西南石油大学,2017:1-46.
[11]刘俊田,翟亚梅,苟红光,等.吐哈盆地托克逊凹陷油气成藏地质条件及勘探潜力[J].新疆石油天然气,2012,8(3):1-6.
[12]杨晓婕.吐哈盆地大河沿地区石炭系—三叠系油气成藏条件分析[D].青岛:中国海洋大学,2013:1-71.
[13]李剑鹏,李永胜,王志勇.吐哈盆地低熟气形成机制、成藏条件及资源潜力基础[J].中国石油和化工标准与质量,2014(10):167.
[14]苏传国,黄卫东,白喜俊,等.吐哈盆地天然气成藏地质条件与富集因素分析[J].天然气地球科学,2009,20(1):50-56.
[15]苟红光,赵莉莉,梁桂宾,等. EUR分级类比法在致密油资源评价中的应用:以三塘湖盆地芦草沟组为例[J].岩性油气藏,2016,28(3):27-33.
[16]张品,苟红光,龙飞,等.吐哈盆地天然气地质条件、资源潜力及勘探方向[J].天然气地球科学,2018,29(10):1531-1541.
[17]吕学菊,邹辰,黄兄,等.统计法在苏北盆地曲塘次凹古近系石油资源评价中的应用[J].地质学刊,2016,40(3):463-468.
[18]张建良,孔祥礼.油田(藏)规模序列法在复杂断块老油田滚动勘探开发中的应用[J].断块油气田,2001,8(6):32-34.