天然气工业
天然氣工業
천연기공업
NATURAL GASINDUSTRY
2009年
12期
109-114
,共6页
张金川%姜生玲%唐玄%张培先%唐颖%荆铁亚
張金川%薑生玲%唐玄%張培先%唐穎%荊鐵亞
장금천%강생령%당현%장배선%당영%형철아
中国%页岩气%资源评价%分区特点%富集模式%开发潜力%华北地台%扬子地台%塔里木地台
中國%頁巖氣%資源評價%分區特點%富集模式%開髮潛力%華北地檯%颺子地檯%塔裏木地檯
중국%혈암기%자원평개%분구특점%부집모식%개발잠력%화북지태%양자지태%탑리목지태
China%shale gas%resource evaluation%feature%accumulation pattern%development potential%North China platform%Yangtze platform%Tarim platform
根据页岩气聚集的机理条件和中、美页岩气地质条件的相似性对比结果认为:中国页岩气富集地质条件优越,具有与美国大致相同的页岩气资源前景及开发潜力.中国含气页岩具有高有机质丰度、高有机质热演化程度及高后期改造程度等"三高"特点,页岩气具有海陆相共存、沉积分区控制以及分布多样复杂等特点.以间接型和直接型页岩气划分方法为基础并结合中国区域地质特点,将中国的页岩气富集模式划分为南方型、北方型及西北型等3种,分别具有以下特点:①以扬子地台为核心的南方型页岩气聚集条件有利并以改造较为严重的海相古生界海相页岩聚气为主,具有单层厚度大、发育层位多、分布面积广、热演化程度高、后期改造强等特点;②以华北地台为主体的北方型页岩气具有古-中-新生界页岩发育齐全、沉积迁移特征明显、薄互层变化频率高、沉积相带分隔明显等特点;③以塔里木地台为基础的西北型页岩气储层以中-古生界为主,沉积类型多、有机碳丰度高、有机质热演化程度相对较低.结论认为:中国页岩气可采资源量约为26×10~(12) m~3,大致与美国的28×10~(12) m~3相当.
根據頁巖氣聚集的機理條件和中、美頁巖氣地質條件的相似性對比結果認為:中國頁巖氣富集地質條件優越,具有與美國大緻相同的頁巖氣資源前景及開髮潛力.中國含氣頁巖具有高有機質豐度、高有機質熱縯化程度及高後期改造程度等"三高"特點,頁巖氣具有海陸相共存、沉積分區控製以及分佈多樣複雜等特點.以間接型和直接型頁巖氣劃分方法為基礎併結閤中國區域地質特點,將中國的頁巖氣富集模式劃分為南方型、北方型及西北型等3種,分彆具有以下特點:①以颺子地檯為覈心的南方型頁巖氣聚集條件有利併以改造較為嚴重的海相古生界海相頁巖聚氣為主,具有單層厚度大、髮育層位多、分佈麵積廣、熱縯化程度高、後期改造彊等特點;②以華北地檯為主體的北方型頁巖氣具有古-中-新生界頁巖髮育齊全、沉積遷移特徵明顯、薄互層變化頻率高、沉積相帶分隔明顯等特點;③以塔裏木地檯為基礎的西北型頁巖氣儲層以中-古生界為主,沉積類型多、有機碳豐度高、有機質熱縯化程度相對較低.結論認為:中國頁巖氣可採資源量約為26×10~(12) m~3,大緻與美國的28×10~(12) m~3相噹.
근거혈암기취집적궤리조건화중、미혈암기지질조건적상사성대비결과인위:중국혈암기부집지질조건우월,구유여미국대치상동적혈암기자원전경급개발잠력.중국함기혈암구유고유궤질봉도、고유궤질열연화정도급고후기개조정도등"삼고"특점,혈암기구유해륙상공존、침적분구공제이급분포다양복잡등특점.이간접형화직접형혈암기화분방법위기출병결합중국구역지질특점,장중국적혈암기부집모식화분위남방형、북방형급서북형등3충,분별구유이하특점:①이양자지태위핵심적남방형혈암기취집조건유리병이개조교위엄중적해상고생계해상혈암취기위주,구유단층후도대、발육층위다、분포면적엄、열연화정도고、후기개조강등특점;②이화북지태위주체적북방형혈암기구유고-중-신생계혈암발육제전、침적천이특정명현、박호층변화빈솔고、침적상대분격명현등특점;③이탑리목지태위기출적서북형혈암기저층이중-고생계위주,침적류형다、유궤탄봉도고、유궤질열연화정도상대교저.결론인위:중국혈암기가채자원량약위26×10~(12) m~3,대치여미국적28×10~(12) m~3상당.
Through comparison analysis of shale gas accumulation conditions and the similarity of geological conditions in the U.S.A and China, this study concluded that both countries have similar geological conditions favorable for shale gas accumulation and have approximate shale gas resource reserves and development potentials. In general, the gas-bearing shale layers in China possess high TOC, high thermal maturity and a high degree of later reformation. Shale gas accumulations are characterized by terrestrial facies deposit, controlled by sedimentation region division, and various and complicated distribution. Shale gas accumulations can be classified into direct and indirect types, and also can be divided into three types as southern type, northern type and north-western type according to the regional geologic conditions in China. The southern type of shale gas, distributed around the Yangtze plate, is mostly accumulated in the Paleozoic marine shale which experienced intensive structural reformation, and is featured by a large thickness of a single layer, multiple developed layers, a wide distribution area, high thermal maturity, and a high degree of later reformation, etc. The northern type of shale gas, distributed in the north China plate, is mostly accumulated in the groups from Paleozoic via Mesozoic to Neozoic, and is characterized by sedimentary migration, a high frequency of thin interbedded layers, and an obvious division between sedimental facies. The north-western type of shale gas, distributed around the Tarim Plate, is accumulated in the groups from Paleozoic to Mesozoic, and has the characteristics of various types of sedimentation, high TOC, and relatively low thermal maturity. It is concluded that the recoverable shale gas resources is predicated to be about 26 tcm in China, close to 28 tcm of that in the U.S.A.