NA TURAL GAS INDUSTRY. vol. 26. no. 12 December 25. 2006 continues to occur in recent years; @complexity of petroleum geology in the Sichuan Basin should be viewed dialectically and new theories should be explored and new fields should be liberated; he key to exploration breakthrough is geological theory and exploration technique inno vation; more reso urces and high quality reserve may be obtained by focusing exploration efforts on two kinds of geological systems (marine paleohigh system and continental foreland basin) and eight types of fracture-pore reservoirs(namely, middle and upper Cambrian dolomite, Carboniferous dolomite, upper Permian Changxing Formation bio- hermal dolomite, lower Triassic Feixianguan Formation oolitic dolomite, Jialingjiang Formation dolorudite, middle Triassic Leikoupo Formation algal clastic dolomite, upper Triassic Xujiahe Formation feldspathic quartzine, and middle and upper Juras- sic redbeds sandstone). It is concluded that natural gas exploration prospect in the Sichuan Basin is bright but under the impact SUBJECT HEADINGS: Sichuan Basin, natural gas, resources, exploration area, exploration policy, fracture(geology), pore reservoir. car bonate rock. sandstone Ran Longhui (professorial senior engineer), is EditorirrChief of N GI, and al so a member of the 6th N GI Editorial committee He graduated in petroleum exploration from the former Beijing Petroleum Institute in 1965 and then got an M. Sc. degree in 1968. He has extensive experiences in theoretical research of natural gas exploration and development as well as in practices He was once Chief Geologist of Sichuan Petroleum Administration and Deputy General Manager of Petro China Southwest Oil Gasfield Company. He has long been engaged in overall study on natural gas exploration in the Sichuan Basin Add: PetroChina Southwest Oil and Gasfield Company, No. 3, Sec. 1, Fuqing Road, Chengdu, Sichuan Province 610051, P R. China Tel:862886011034 ANALYSIS ON GAS EXPLORATION POTENTIAL IN SULIGE AREA OF THE ORDOS BASIN Yang Hua, Xi Shengli, Wei Xinshan, Wang Huaichang, Han Huiping( Petro China Changqing Oilfield Co.,Ltd.). NA TUR. GASIND.v.26,no.12,pp.45-48,12/25/2006.(IssN1000-0976;hChi ABSTRACT: In the Sulige area there are well-developed overlaying coal bearing hydrocar bor source rocks, banded sand body distributed near longitudinally in the block, thick and farranging caprock, and the side shielding by the claystone(floodplains and distributary bays)and dense sandstone existed in this region. Therefore, a perfect play source-resevoirseal) of the Sulige area could be easily formed under good conditions of accumulation and preservation for the lithologic traps, with the structural features of being gradually west-inclined. Although there is huge amount of resource in this Block, the exploration rate is ex tremely low with even less- level exploration beyond the explored reserve block. However there still exists great exploration po- tential due to its favorable geological condition for gas accumulation, and so all directions of the Sulige area will be potentially dvantageous exploration targets SUBIECT HEADINGS: Changqing Oilfield, Sulige area, natural gas, accumulation characteristics, exploration assessement ploration zone Yang Hua (professorial senior engineer), born in 1963, graduated in 1984 from the former Southwest Petroleum Institute. He holds a Ph. D degree. Add Petro China Changqing Oilfield Co, Ltd., Xian, Shaanxi Province 710021, P. R. China A PREL IMINARY STUDY ON THE MOD EL FOR MIXING OF VOLCANIG MANILE-DERIVED AND OR GANIC CO- NORTHERN MARGIN BASINS OF SO UTH CHINA SEA AS A CASE Li Meijun, Wang Tieguan( Key Laboratoty for Hydrocarbon Accumulation Mechanism .Chinese Ministry of Education, Earth Sciences and Geoinformatics School, China University of Petroleum). NA TUR. GAS IND.V.26,mo.12,pp.4952,12/25/2006.(IssN1000-0976; In Chinese) ABSTRACT: It has been widely accepted that the COz is mainly of inorganic origin when its content is higher than 10 %(v % or 15%(wt %) in natural gas pools. Taking northern shelf margin basins of South China Sea as an example, this paper estab- shed a mixing model of typical volcanic- mantle and organic CO2 to explain above rule for the first time. In despite of the differ www.trqgy.cn/e/abstracts.asp 2 o1994-2007 China Academic Journal Electronic Publishing House. All rights reserved hp: /ws cnki netcontinues to occur in recent years; ②complexity of petroleum geology in the Sichuan Basin should be viewed dialectically and new theories should be explored and new fields should be liberated ; ③the key to exploration breakthrough is geological theory and exploration technique innovation ; ④more resources and high quality reserve may be obtained by focusing exploration efforts on two kinds of geological systems (marine paleohigh system and continental foreland basin) and eight types of fracture2pore reservoirs (namely , middle and upper Cambrian dolomite , Carboniferous dolomite , upper Permian Changxing Formation bio2 hermal dolomite , lower Triassic Feixianguan Formation oolitic dolomite , Jialingjiang Formation dolorudite , middle Triassic Leikoupo Formation algal clastic dolomite , upper Triassic Xujiahe Formation feldspathic quartzine , and middle and upper J uras2 sic redbeds sandstone) . It is concluded that natural gas exploration prospect in the Sichuan Basin is bright but under the impact of increasing difficulty. SUBJECT HEADINGS : Sichuan Basin , natural gas , resources , exploration area , exploration policy , fracture (geology) , pore , reservoir , carbonate rock , sandstone Ran Longhui (professorial senior engineer) , is Editor2in2Chief of N GI , and also a member of the 6th N GI Editorial committee. He graduated in petroleum exploration from the former Beijing Petroleum Institute in 1965 and then got an M. Sc. degree in 1968. He has extensive experiences in theoretical research of natural gas exploration and development as well as in practices. He was once Chief Geologist of Sichuan Petroleum Administration and Deputy General Manager of PetroChina Southwest Oil & Gasfield Company. He has long been engaged in overall study on natural gas exploration in the Sichuan Basin. Add : PetroChina Southwest Oil and Gasfield Company , No. 3 , Sec. 1 , Fuqing Road , Chengdu , Sichuan Province 610051 , P. R. China Tel : 8622828601 1034 5 www. trqgy. cn/ e/ abstracts. asp ANALYSIS ON GAS EXPLORATION POTENTIAL IN SULIGE AREA OF THE ORDOS BASIN Yang Hua , Xi Shengli , Wei Xinshan , Wang Huaichang , Han Huiping (PetroChina Changqing Oilfield Co. , Ltd. ) . N A TU R. GA S I N D . v. 26 , no. 12 , pp . 45248 , 12/ 25/ 2006. ( ISSN 1000 - 0976 ; In Chi2 nese) ABSTRACT: In the Sulige area there are well2developed overlaying coal2bearing hydrocarbon2source rocks , banded sand body distributed near longitudinally in the block , thick and far2ranging caprock , and the side shielding by the claystone (floodplains and distributary bays) and dense sandstone existed in this region. Therefore , a perfect play (source2resevoir2seal) of the Sulige area could be easily formed under good conditions of accumulation and preservation for the lithologic trap s , with the structural features of being gradually west2inclined. Although there is huge amount of resource in this Block , the exploration rate is ex2 tremely low with even less2level exploration beyond the explored reserve block. However there still exists great exploration po2 tential due to its favorable geological condition for gas accumulation , and so all directions of the Sulige area will be potentially advantageous exploration targets. SUBJECT HEADINGS : Changqing Oilfield , Sulige area , natural gas , accumulation characteristics , exploration assessement , exploration zone Yang Hua (professorial senior engineer) , born in 1963 , graduated in 1984 from the former Southwest Petroleum Institute. He holds a Ph. D degree. Add : PetroChina Changqing Oilfield Co. , Ltd. , Xi’an , Shaanxi Province 710021 , P. R. China A PRELIMINARY STUDY ON THE MODEL FOR MIXINGOF VOLCANIC2MANTLE2DERIVED AND OR2 GANIC CO2 - NORTHERN MARGIN BASINS OF SOUTH CHINA SEA AS A CASE Li Meijun , Wang Tieguan ( Key Laboratoty for Hydrocarbon Accumulation Mechanism ·Chinese Ministry of Education , Eart h Sciences and Geoinformatics School , China University of Petroleum) . N A TU R. GA S I N D . v. 26 , no. 12 , pp . 49252 , 12/ 25/ 2006. (ISSN 1000 - 0976 ; In Chinese) ABSTRACT: It has been widely accepted that the CO2 is mainly of inorganic origin when its content is higher than 10 % (v %) or 15 % (wt. %) in natural gas pools. Taking northern shelf margin basins of South China Sea as an example , this paper estab2 lished a mixing model of typical volcanic2mantle and organic CO2 to explain above rule for the first time. In despite of the differ2 N A TURA L GA S I N DUS T R Y , vol. 26 , no. 12 December 25 , 2006 © 1994-2007 China Academic Journal Electronic Publishing House. All rights reserved. http://www.cnki.net