Evaluation on source rocks and the oil-source correlation in Bayanhushu sag of Hailaer Basin

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1 GLOBAL GEOLOGY Vol. 30 No. 2 Jun Ⅰ Ⅱ P A doi /j. issn Evaluation on source rocks and the oil-source correlation in Bayanhushu sag of Hailaer Basin BAI Xue-feng ZHANG Hai-qiao Research Institute of Exploration and Development PetroChina Daqing Oilfield Company Ltd Daqing Heilongjiang China Abstract In Bayanhushu sag of Hailaer Basin developed three sets of source rocks including the first member of Damoguaihe Formation and the first and second members of Nantun Formation. The analysis on the source rocks of drilled strata in 7 wells in the studied area shows that the source rocks in the three members are widely distributed with a high abundance of organic matters and the types of organic matters are mainly type I and II 1 which reach to the standard of good source rocks with great difference of maturity. The three sets of source rocks in depression zone all belong to mature source rocks although the dark mudstone in western steep slope is thick the source rocks of the first member of Nantun Formation is matured only the other two are immature and mid-mature source rocks effected by later tectonic events. Through the analysis of chromatography and mass spectrometry and the contrast of biomarker the oil in Nantun Formation mainly originated from the source rocks of the same formation which are autogenous oil-gas. Key words Hailaer Basin Bayanhushu sag source rock oil-source correlation km

232 30 300 2005 TOC A S1 15 16 + S2 1 3 7 3. 49% A 0. 390 5% S1 + S2 28. 07 mg /g 3. 29% A 0. 264 4% 1 S1 + S2 25.

2 TOC A S S % A % S1 + S mg /g 3. 29% A % 1 S1 + S mg /g 4. 05% A % S1 + S mg /g K 1 n 1 3 K 1 n 2 K 1 d 1 17 Fig. 1 1 Tectonic units of Bayanhusu sag of Hailaer Basin

3 Table 1 Comprehensive evaluation of hydrocarbon abundance of source rocks in Nantun Formation -1st member of Damoguaihe of Bayanhusu sag TOC /% A /% S1 + S2 /mg g ~ / ~ / ~ / ~ / ~ / ~ / ~ / ~ / ~ / a - b /c d a b c d. 2 C Ⅰ Ⅱ 10 Ⅰ Ⅰ Ⅰ Ⅱ1 - Ⅱ2 Ⅲ 18 1 Ⅱ1 Table 2 2 Analysis results of organic petrological characteristics of source rocks in Bayanhusu sag /% /% /% /% 137 ~ 285 / ~ 19 /9 4 6 ~ 132 / ~ 14 /9 5 Ⅰ 4 Ⅱ ~ 294 / ~ 10 / ~ 10 /6 10 Ⅰ 10 a - b /c d a b c d C C 3 C Ⅰ % ~ % % Ⅱ Ⅰ Ⅰ C Ⅰ - Ⅱ % ~ % % Ⅰ Ⅱ2 Ⅰ - Ⅱ1 78% Ⅰ Ⅱ1 Ⅰ Table 3 3 C Analytical results of Kerogen carbon isotope δ 13 C /% ~ - 29 Ⅰ Ⅱ ~ Ⅰ 2. 3 Ⅰ Ⅱ1 Ⅰ Ⅱ2 3 3 Ro 0. 35%

4 m 4 Ro 0. 74% ~ 0. 88% 0. 8% m H /C - O /C - Fig. 2 Relationship between the Kerogen H /C - O /C of source rocks in Bayanhusu sag ~ 0. 88% 3 Ro % ~ % Ro 0. 5% m Ro Fig. 4 Relationship between Ro and depth in Well 3 Chu2 of gentle slope belt Ro 0. 68% ~ 0. 83% 0. 74% Fig Ro Relationship between Ro and depth in Well Su1 of steep slope belt Fig Ro Relationship between Ro and depth in Well Chu4 of trough zone

5 2 235 β - m /z = γ - m /z = β - 6 γ - 16 Fig GC - MS characteristics of sterane and terpane in oil and source rocks of 1st member of Nantun Formation in Well Shu1 Bayanhusu sag m g /cm m g /cm m g /cm 3 7 Fig. 7 Maturity of oil GC - MS in Bayanhusu sag

6 LIU Chun-xi WANG Shi-bo. A study on fault sealability in Hailaer Basin J. Petroleum Geology & Oilfield De velopment in Daqing J ZHANG Ji-guang. The formation of unconformity and its oil-gas geological significance in Hailaer Basin J. Petroleum Geology & Oilfield Development in Daqing J FENG Zhi-qiang ZHANG Xiao-dong REN Yan-guang et al. Hydrocarbon reservoir forming characteristics and distribution rule of Hailaer Basin J. Petroleum Geology & Oilfield Development in Daqing J ZHANG Ji-guang. Similarity and diversity between 3 Hailaer Basin and Erlian Basin J. Petroleum Exploration and Development β - 7. m /z = 125 γ - m /z = 191 J LIU Wei FENG Jie WANG Shu-zhi et al. Organic facies distribution characteristics of hydrocarbon resource rock of coal-measure strata in Hailaer Basin J. Petroleum Geology & Oilfield Development in Daqing MA Xue-hui ZHANG Hai-qiao SONG Ji-jie. Research M Compiling Group for the Petroleum Geology of Daqing Oil on reservoir-forming periods of Wuerxun Sag of Hailaer Basin J. Petroleum Geology & Oilfield Development in Field. Petroleum geology of China Vol. 2 M. Beijing Petroleum Daqing Industry Press J. J ZHANG Ji-guang. Structural feature and hydrocarbon potential in Hailaer Basin J. Petroleum Geology & Oilfield Development in Daqing J. Earth Science Edition J CAO Rui-cheng QU Xi-yu WEN Quan et al. Physical properties and control factors of reservoir in Beier Depression Halaer Basin J. Journal of Jilin University 10. J

7 2 237 HUO Qiu-li WANG Zhen-ying LI Min et al. Study on the source and migration of oil and gases in the Beier Depression in the Hailaer Basin J. Journal of Jilin U- niversity Earth Science Edition J. J SUN Guo-xin ZHANG Ya-jin LI Feng-jun et al. Petroleum geologic characteristics and exploration potential WANG Hai-yan LIU Li GAO Yu-qiao et al. Discuscion of diageneses of volcaniclastic rock s of Nantun Formanon in Beier sags Hailar Basin J. Global Geolo- Development in Daqing of Bayanhushu Sag J. Petroleum Geology & Oilfield gy J J. WANG Yong-lin ZHANG Ji-guang QIN Jian-zhong Explortation potential of immature oil in the Bayanhushu YOU Li LI Chun-bai LIU Li et al. Relationship of Depression of Hailaer Basin J. Petroleum Geology & sandstone diagenesis and relatively high porosity areas in Experiment Nantun and Tongbomiao Formation a case from the 17. southern of Wuerxun Depression in Hailaer Basin J. Journal of Jilin University Earth Science Edition Lengthways distributing characteristics of reservoirs pore from Triassic Budate Group to Early Cretaceous Damoguaihe in Beier sags Hailar Basin J. Global Geology M HUANG Di-fan LI Jin-chao ZHOU Weng-hong et al. 13. Evolution and hydrocarbon generation mechanism of terrestrial organic matter M. Beijing Petroleum Indus- J try Press HUANG Chao-yi LIU Zhi-hong GAO Jun-yi. Structur- 18. al characteristics and base extension amount of Wuerxun J. graben of Hailar Basin J. Global Geology XIA Xin-yu HONG Feng ZHAO Lin et al. Organic 14. facies type and hydrocarbon potential of carbonates in Majiagou Fm lower Ordovician in Ordos Basin J. J Acta Sedimentologica Sinica WANG Qian-ping LIU Li ZHANG Xin-tao et al.

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