湘中坳陷上泥盆统锡矿山组页岩气成藏条件及资源量预测
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摘要
在野外地质露头观察和样品测试数据综合分析的基础上,对湘中坳陷上泥盆统暗色泥页岩的厚度与区域分布、有机质丰度、成熟度以及储层矿物学特征、烃源岩热演化史等页岩气藏形成条件与沉积环境进行了研究。该区由北向南依次发育三角洲相、碎屑岩潮坪相及潟湖相等沉积相带;暗色泥页岩的厚度较大且区域分布广泛,呈现北厚南薄的趋势;页岩总有机碳含量高,有机质以高成熟与过成熟为主,储层物性好,脆性矿物含量高,游离气含量高,烃源岩正处于高热演化期;应用体积法预测出湘中坳陷泥盆统锡矿山组总资源量为(0.219~0.420)×10~(12) m~3。
Based on comprehensive analysis of outcrops observation and sample testing data of Xikuangshan formation of Upper Devonian,to analysis accumulative conditions of shale gas and sedimentary environment in the area,such as regional distribution,contents of organic maturity,reservoir mineralogical characteristics,burial history of the dark shale.The sedimentary facies zones developed in the depression include delta facies,tidal-flat facies and lagoon facies distributed from the north to the south.Shale occurred widely and distributed stably in the area,which becomes gradually thinner from the north to the south.The shale has high total organic carbon(TOC),high organic matter maturity,good physical property of reservoir,high brittle mineral content,high content of free gas.It was supposed that the hydrocarbon source rock in the higher mature.The volumetric method applied for predicting the resource,the total quantity was(0.219~0.420)×10~(12) m~3.
Based on comprehensive analysis of outcrops observation and sample testing data of Xikuangshan formation of Upper Devonian,to analysis accumulative conditions of shale gas and sedimentary environment in the area,such as regional distribution,contents of organic maturity,reservoir mineralogical characteristics,burial history of the dark shale.The sedimentary facies zones developed in the depression include delta facies,tidal-flat facies and lagoon facies distributed from the north to the south.Shale occurred widely and distributed stably in the area,which becomes gradually thinner from the north to the south.The shale has high total organic carbon(TOC),high organic matter maturity,good physical property of reservoir,high brittle mineral content,high content of free gas.It was supposed that the hydrocarbon source rock in the higher mature.The volumetric method applied for predicting the resource,the total quantity was(0.219~0.420)×10~(12) m~3.
引文
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[2]张金川,聂海宽,徐波,等.四川盆地页岩气成藏地质条件[J].天然气工业,2008,28(2):151-156.
[3]HICKEY J J,HENK B.Lithofacies summary of the Mississippian Barnett Shale,Mitchell 2T.P.Sims well,Wise County,Texas[J].AAPG Bulletin,2007,91(4):437-443.
[4]祁开令.湘中涟源凹陷上古界油气成藏期次与聚集规律的初步探讨[J].国土资源导刊,2006(S1):30-32.
[5]朱伟,易积正.湘中涟源地区复杂地质结构与天然气勘探潜力[J].特种油气藏,2012,19(3):35-38.
[6]曹清古,韦庆亮,肖秋苟,等.湘中坳陷下石炭统孟公坳段页岩气成藏条件及勘探前景[J].海相油气地质,2015,20(3):43-49.
[7]张琳婷,郭建华,焦鹏,等.湘中地区涟源凹陷下石炭统页岩气藏形成条件[J].中南大学学报(自然科学版),2014,45(4):2269-2277.
[8]郭建华,旷理雄,朱锐,等.湘中涟源凹陷杨家山地区下石炭统天然气成藏条件[J].中南大学学报,2008,39(1):178-184.
[9]刘喜顺.湘中坳陷泥盆-石炭系油气成藏与保存条件研究[D].长沙:中南大学,2009:14-211.
[10]赵宗举,朱琰,李大成,等.中国南方大地构造演化及其对油气的控制[J].成都理工大学学报(自然科学版),2003,30(2):155-168.
[11]马少妍,徐猛,甘丽丽,等.湘中地区页岩气勘探潜力与地化特征评价[J].油气地球物理,2013,11(2):56-59.
[12]黄俨然,曹运江,杨荣丰,等.湘中坳陷泥盆系页岩气生储特征及勘探潜力研究[J].非常规油气,2017,4(3):8-14.
[13]郭彤楼,刘若冰.复杂构造区高演化程度海相页岩气勘探突破的启示---以四川盆地东部盆缘JY1井为例[J].天然气地球科学,2013,24(4):643-651.
[14]左中航,杨飞,张操.川东南地区志系龙马溪组页岩气有利区评价优选[J].化工矿产地质,2012,34(3):135-142.
[15]邱小松,杨波,胡明毅.中扬子地区五峰组-龙马溪组页岩气储层及含气性特征[J].天然气地球科学,2013,24(6):1274-1283.
[16]马若龙.湘中、湘东南及湘东北地区泥页岩层系地质特征与页岩气勘探力[D].成都:成都理工大学,2013:135-146.