P E T R O L E U M G E O L O G Y MSD-5973 HP-5MS 30m 0.25mm 0.25 m 50 2min 3 /mi n min 1mL/min eV DW1 DW105 DW a

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1 P E T R O L E U M G E O L O G Y /j.issn t

2 P E T R O L E U M G E O L O G Y MSD-5973 HP-5MS 30m 0.25mm 0.25 m 50 2min 3 /mi n min 1mL/min eV DW1 DW105 DW a g/cm 3 2 a 2 b 1 b 1 HP [9] [1] [2] [1] [4] [3 8] 4- [9] 4 -MDD 1-1 -MDD

3 3-3-MDD 4 -MDD/ 1- MDD+3-MDD+4-MDD [3] 4-MDD/ 3-MDD 4-MDD/ 1-MDD+3-MDD+4-MDD 4,9-DMDD/3,4-DMDD 4-MDD/3-MDD MDD/(1-MDD+3-MDD+4- MDD) ,9-DMDD/3, DMDD MP R 29

4 P E T R O L E U M G E O L O G Y [2] 4 2 1,3- /1,2,5,7-1,3-DMD/1,2,5,7-FMD 5 4 1,3 -DMD/1,2,5,7-FMD 3 30

5 5 [2] W in g er t W S. G C/ M S a n al y si s of di a mo n d oi d hydrocarbons in Smackover petroleum [J].Fuel,1992, 71(1): [3]. [J]. 1995,17(3): [4]. [ J]. 1997,7(3): [5]. [J]. 1998,26(3): [6]. [J]. 2009,30(2): [7]. [J]. 2001,19(1): [8] Schulz L K, Arnd W, Elin R,et al.application of [1] D a h l J E, M o l d o w a n J M, P e t e r s K E, e t a l. Diamondoid hydrocarbons as indicators of natural oil cracking[j]. Nature, 1999,399(6731): diamondoids to distinguish source rock facies [J]. Organic Geochemistry. 2001,32(3): [9]. [J]. 2007,18(5):

6 C H I N A P E T R O L E U M E X P L O R A T I O N Hydrocarbon Accumulation Regulation and Exploration Potential Analysis of Structural-Lithologic Reservoir in Slope Zone of Structure 428, Bohai Basin/Shi Wenlong, Lai Weicheng, Wei Gang, Guo Tao, Wang Jun//CNOOC Tianjin Branch, Tianjin Abstract: Lots of exploratory wells were drilled around the slope zone of Structure 428 in the past two years, and significant discoveries were made in Paleogene reservoirs. However, the structural trips for next drilling and exploration were very limited. In order to clarify the exploration potential of the area, comprehensive study was done on regional structure-sedimentary evolution features, from the perspective of regionalstereoscopic exploration. The control of structural evolution to sedimentary patterns and their distribution range was analyzed, and its effect on hydrocarbon accumulation was also discussed. On the basis of establishing regional sedimentary patterns, the hydrocarbon reservoir accumulation regulation of the area was clarified. It was believed that a large scale structure-lithologic hydrocarbon reservoir existed under the second member of Paleogene Dongying Formation, and oil and gas was mainly controlled by the development situation and distribution range of reservoirs under regional mudstone cap rock. The establishment of the sedimentary pattern god rid of the constraint of the idea of pure exploration of structural reservoirs. It was proposed that the exploration idea of structural-lithologic reservoir be set for the slope zone of Structure 428. The establishment of hydrocarbon accumulation pattern expanded the exploration potential of the area and provided technical support for next overall exploration evaluation of hydrocarbon reservoirs in the area. Key words: Bozhong sag; Shijiutuo swell; Structure 428; hydrocarbon accumulation regulation; complex reservoir Application of Diamondoids to Hydrocarbon Migration in Dawanqi Oilfield, Tarim Basin/Ren Kangxu 1, Huang Guanghui 2, Xiao Zhongyao 1, Zhang Min 2, Zhang Baoshou 1, Wei Hongxing 1, Ma Zhiyuan 3 //1. Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla City, Xinjiang Uygur Autonomous Region ; 2. Department of Geochemistry, Yangtze University, Jinzhou City, Hubei Province ; 3. Sinopec International Petroleum Service Corporation, Beijing Abstract: Dawanqi Oilfield is a light oil-based oilfield. The concentration of biomarkers and the abundance of neutral nitrogenous compounds are comparatively low that make it difficult to reveal the crude oil migration characteristics. Research shows that, commonly, there is a kind of compounds with high thermal stability in oils of Dawanqi Oilfield. They are the diamondoids, including diamondoid and bidiamondoid hydrocarbons. Chromatographic analysis indicates the compounds with different structure have great discrepancy in their chromatographic retention behavior. According to the similarity of chromatographic retention behavior and stratum chromatographic effect in principle, the oil fractionation effects of Dawanqi Oilfield during migration have been studied by using the ratios of diamondoids with different chemical structure. The results show that the migration parameters based on diamondoids have obvious distribution law. In general, the migration parameters of diamondoids increase as the buried depth gets shallower. The results indicate that crude oil migrates vertically. The migration parameters of diamondoids are low in areas near deep faults. The migration parameters of diamondoid increase from south to north far from those deep faults in the plane. All these show that the main migration direction of the crude oil in Dawanqi Oilfield is from south to north. Key words: Tarim Basin; Dawanqi Oilfield; diamondoids; migration parameter; fractionation effect Characteristics of Clay Minerals and Reservoir Sensitivity in Upper Paleozoic of Sulige Gas Field/Li Mingrui 1, Zhang Qing 2, Wang Mingyu 3 // 1. Exploration Department of PetroChina Changqing Oilfield Company, Xi'an City, Shaanxi Province ; 2. Sulige Gas Field Research Center of PetroChina Changqing Oilfield Company, XiÕan City, Shaanxi Province ; 3. Ultra-low Permeability 2nd Project Department of PetroChina Changqing Oilfield Company, Qingyang City, Gansu Province Abstract: It is the clay minerals that distribute widely in the key gas-bearing reservoirs of the 8th Member of Shihezi Formation and the 1st Member of Shanxi Formation in the Upper Paleozoic of Sulige gas field. The content change of clay minerals influences the pore structure features, initiates the reservoir sensitivity, changes the reservoir seepage ability and affects the gas productivity in Sulige gas field. Through studying the characteristic of clay minerals and reservoir sensitivity, it can be concluded that core permeability is influenced by water-sensitivity, acid-sensitivity, stress-sensitivity, speed-sensitivity, and salt-sensitivity by turn from the strong to the weak. It is the water-sensitivity and acidsensitivity that are the most harmful to reservoir. At the same time, corresponding measures for reservoir protection and reconstruction are proposed. For example, it needs high sand ratio and low fracturing fluid during the course of fracture technology for water-sensitive area. Attention should be paid to acid-sensitive injury to reservoir of chlorite enrichment region. For improved acid-sensitive reservoir, rational prepositioned acid fracturing technique could be adopted to carry out reconstruction, enhance permeability and increase single well productivity. Key words: Sulige gas field; Upper Paleozoic; clay minerals; reservoir sensitivity Available Approach to Structural Fracture Estimating---A Case Study of Dongying Formation in Eastern Limb of North Dagang Structural Zone/ Zhang Shouren 1, 2, Zhang Suian 1, Wan Guilong 3 //1. MOE Key Laboratory of Petroleum Engineering in China University of Petroleum, Beijing ; 2. China United Coalbed Methane Co., Ltd., Beijing ; 3. School of Earth Science and Resources in China University of Geosciences, Beijing Abstract: In the case of more and more serious energy crisis, along with the deepgoing petroleum & gas exploration and development, it is desired urgently for the exploring technology for fractured reservoir. The fractured reservoir is built up mainly by structural fracture, so structural

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P E T R O L E U M G E O L O G Y 10 11 P E T R O L E U M G E O L O G Y 12 13 P E T R O L E U M G E O L O G Y 14 15 P E T R O L E U M G E O L O G Y 16 C H I N A P E T R O L E U M E X P L O R A T I O N ABSTRACT