摘要
为了讨论页岩气产业的发展方向,从页岩气成藏地质条件、资源分布、勘探前景等方面探讨和评价了中国深层页岩气的资源前景和勘探潜力。研究结果表明:①自中元古代以来,不同类型的潜质页岩发育于纵向16套层系之中,它们均有形成深层页岩气的地质基础条件,形成了南方以下古生界海相为主、北方以中新生界陆相为主且受盆地类型(东中西部差异)约束、晚古生代海陆过渡相南北方均有发育的页岩气分布格局;②扬子、华北及塔里木板块均有形成深层页岩气的基础地质条件,但类型特点及分布各有差异,具有南北分区、东西分带的特点;③采用限定条件下的深度趋势分析法,预测我国埋深介于4500~6000 m的页岩气地质资源量和可采资源量(P_(50))分别为61.10×10^12m^3和11.07×10^12m^3,埋深介于3000~6000 m的页岩气地质资源量和可采资源量分别为115.72×10^12m^3和20.93×10^12m^3,其中规模性的深层页岩气资源量主要分布在四川盆地及其周缘地区,是深层页岩气勘探重要的现实领域,其次是鄂尔多斯、塔里木、准噶尔、渤海湾及松辽等大中型盆地及其周缘地区,在平面上分别形成了上扬子、西北、华北及东北等深层页岩气资源分布中心;④在现今含油气盆地中,深层页岩气主要分布在沉降—沉积中心方向,除了早古生代海相页岩之外,晚古生代海陆过渡相和中新生代陆相(含中小型盆地)页岩也是深层页岩气资源分布的有利指向,在中新生代陆相盆地中,不同构造部位下伏的上古生界也有望成为深层页岩气勘探研究的重要领域。结论认为,我国深层页岩气资源丰富、类型多样、分布广泛,具有良好的资源前景和重大的勘探意义,是我国页岩气产业发展的基本方向。
In order to discuss the development direction of the shale gas industry in China,the resource prospects and exploration potential of deep shale gas were discussed and evaluated from the aspects of shale gas accumulation geological conditions,resource distribution,and exploration prospects.Research results show that:(1)The sixteen sets of potential shale formations with different types were developed since Mesoproterozoic and all of them have the geological basic conditions for the formation of deep shale gas.Specifically,South China is dominated by early Paleozoic marine shale,North China is dominated by Mesozoic and Cenozoic continental shale,and is restricted by various basin types,the late Paleozoic transitional facies are both developed in the north and south.(2)All of the Yangtze,North China and Tarim Plates have the basic geological conditions for the formation of deep shale gas,but the type and distribution characteristics of shale gas are obviously different,forming the north-south division and the east-west zoning distribution pattern.(3)Estimated by depth trend analysis method under certain conditions,the geological and recoverable resources(P50)of deep shale gas in China at 4500 m-6000 m are 61.10×10^12 m^3 and 11.07×10^12 m^3,respectively.The total geological and recoverable resources(P50)of deep shale gas at 3000 m-6000 m are 115.72×10^12 m^3 and 20.93×10^12 m^3,respectively.Large-scale deep shale gas is mainly distributed in large and medium-sized basins and their peripheries,such as Sichuan,Junggar,Tarim,Ordos,Bohai Bay and Songliao basins.As a result,the distribution centers of deep shale gas resources in the Upper Yangtze,Northwest,North China and Northeast China have been formed,among which the Sichuan Basin and their peripheries are the most realistic areas for the distribution and exploration of deep shale gas resources.(4)In petroliferous basins,deep shale gas is mainly distributed in the subsidence-deposition centers.In addition to the early Paleozoic marine shale,the late Paleozoic transitional and the Mesozoic Cenozoic terrigenous(including small and medium-sized basins)shales are also favorable directions for the distribution of deep shale gas resources.In the Meso Cenozoic continental basins,Upper Paleozoic shale strata under different structural positions are also important fields for the distribution and exploration of deep shale gas resources.In conclusion,deep shale gas characterized by high abundance,multiple types and wide distribution has good resource potential and great exploration significance,which is a basic direction of shale gas exploration and development in China.
作者
张金川
陶佳
李振
王锡伟
李兴起
姜生玲
王东升
赵星旭
ZHANG Jinchuan;TAO Jia;LI Zhen;WANG Xiwei;LI Xingqi;JIANG Shengling;WANG Dongsheng;ZHAO Xingxu(Key Laboratory of Strategy Evaluation for Shale Gas,Ministry of Natural Resources//China University of Geosciences,Beijing 100083,China;Longdong University,Qingyang,Gansu 745000,China)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2021年第1期15-28,共14页
Natural Gas Industry
基金
国家自然科学基金项目“页岩含气性关键参数测试及智能评价系统”(编号:41927801)
国家科技重大专项“页岩气分类分级资源评价方法研究”(编号:2016ZX05034-002-001)。
关键词
深层页岩气
成藏地质条件
类型特点
资源潜力
分布规律
勘探前景
Deep shale gas
Geological conditions of gas accumulation
Shale gas tape
Resource potential
Distribution law
Exploration prospects
