加里曼丹岛库泰盆地海相成藏组合特征及油气富集区分带性分析
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摘要
通过系统收集和分析库泰盆地钻井岩屑样品及野外露头样品,首次对下中新统海相油气系统进行了评价。结果发现该区域以生物礁碳酸盐岩为标志层,发育多套海相沉积旋回,海相沉积油气系统具有自生自储自封堵特征:暗色海相泥岩为主力烃源岩,海相砂岩为有利储层,同时,海相泥岩作为有效盖层。下中新统海相烃源岩样品有机质类型为Ⅱ/Ⅲ型,以Ⅱ型为主,总有机碳质量分数(TOC)平均值1.92%,有机质处于低熟-成熟阶段,为有效烃源岩,烃源岩厚度较大,指示良好的生烃潜力;储层多期发育,具有低阻特征。自西向东,库泰盆地油气成藏系统时代变新、层系变浅:①盆地东部望加锡海峡深水-半深水区域以上中新统-上新统深水沉积成藏系统为主;②中部马哈坎三角洲-浅海区域以中中新统三角洲相成藏组合为主;③马哈坎褶皱带以下中新统海相成藏组合为主;④盆地西部以渐新统-始新统裂谷期成藏组合为主。新层段海相油气成藏系统的发现,揭示了库泰盆地有利成藏组合的分带规律,指明了库泰盆地中西部区域的未来油气勘探方向。
In this study, the Lower Miocene marine petroleum system was evaluated based on systemic sample collection and analysis, including cutting samples from wells and rock samples from outcrops. The analysis results revealed multiple similar marine sediment sequences developed in this area, which were indicated by the presence of carbonate rocks. The marine petroleum system has the following characteristics: a thick dark shale acted both as major source rock and seal rock, while the marine sand acted as an efficient reservoir. The source rock was dominated by kerogen type Ⅱ/Ⅲ and major type Ⅱ, with the average total organic carbon(TOC) value of 1.92%. Meanwhile, the maturity of source rock, which was in its early mature period to mature period, implied efficient marine source rock for this petroleum system. Furthermore, the great thickness of source rock implied favorable hydrocarbon generation potential. The marine sand reservoir, which is developed in multiple stages, exhibited low-resistivity feature. From east to west in the Kutei Basin, the petroleum play exhibited an oldening and deepening trend: ① Upper Miocene to Pliocene deep water petroleum play in the east Kutei Basin of the Makassar Strait, ② Middle Miocene deltaic petroleum play in Mahakam delta and shallow marine area, the Central Kutei Basin, ③ Lower Miocene marine petroleum play in Mahakam fold, and ④ Eocene to Oligocene rift petroleum play in uplifts, the west Kutei Basin. The discovery of a new efficient marine petroleum system not only reveals the different plays in different structural zones of the Kutei Basin but also provides significance for future explorations in the western part of the Kutei Basin.
In this study, the Lower Miocene marine petroleum system was evaluated based on systemic sample collection and analysis, including cutting samples from wells and rock samples from outcrops. The analysis results revealed multiple similar marine sediment sequences developed in this area, which were indicated by the presence of carbonate rocks. The marine petroleum system has the following characteristics: a thick dark shale acted both as major source rock and seal rock, while the marine sand acted as an efficient reservoir. The source rock was dominated by kerogen type Ⅱ/Ⅲ and major type Ⅱ, with the average total organic carbon(TOC) value of 1.92%. Meanwhile, the maturity of source rock, which was in its early mature period to mature period, implied efficient marine source rock for this petroleum system. Furthermore, the great thickness of source rock implied favorable hydrocarbon generation potential. The marine sand reservoir, which is developed in multiple stages, exhibited low-resistivity feature. From east to west in the Kutei Basin, the petroleum play exhibited an oldening and deepening trend: ① Upper Miocene to Pliocene deep water petroleum play in the east Kutei Basin of the Makassar Strait, ② Middle Miocene deltaic petroleum play in Mahakam delta and shallow marine area, the Central Kutei Basin, ③ Lower Miocene marine petroleum play in Mahakam fold, and ④ Eocene to Oligocene rift petroleum play in uplifts, the west Kutei Basin. The discovery of a new efficient marine petroleum system not only reveals the different plays in different structural zones of the Kutei Basin but also provides significance for future explorations in the western part of the Kutei Basin.
引文
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[2]Duval B C,Cassaigneau C,de Janvry C,et al.Technology and exploration efficiency in the Mahakam Delta Province,Indonesia[C]//World Petroleum Congress.Proceeding of the 15th World Petroleum Congress.Beijing:World Petroleum Congress,1998:187-200.
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[5]鲁银涛,王彬,吕福亮,等.西沙周缘新生代构造演化与盆地充填响应特征[J].海洋科学,2013,37(3):70-76.Lu Yintao,Wang Bin,LüFuliang,et al.Tertiary tectonic movements and sediment characters in Basins of Xisha Area[J].Marine Sciences,2013,37(3):70-76.
[6]田洁,吴时国,王大伟,等.西沙海域碳酸盐台地周缘水道沉积体系[J].海洋学报,2016,40(6):101-109.Tian Jie,Wu Shiguo,Wang Dawei,et al.Characteristics of periplatform channels of the Xisha area,northern South China Sea[J].Marine Sciences,2016,40(6):101-109.
[7]王磊,吴时国,李清平,等.珠江口盆地陆架坡折带海底滑坡及其影响因素[J].海洋科学,2016,40(5):131-141.Wang Lei,Wu Shiguo,Li Qingping,et al.Submarine slides and influencing factors in the continental shelf break area of the Pearl River Mouth Basin[J].Marine Sciences,2016,40(5):131-141.
[8]Moss S J,Chambers J L C.Tertiary facies architecture in the Kutei Basin,Kalimantan,Indonesia[J].Journal of Asia Earth Sciences,1999,17(1-2):157-181.
[9]Cibaj I,Wiweko A.Recognition of progradational shelf deposits in the middle Miocene of Kutei Basin[C]//Indonesia Petroleum Association.Thirty-second Annual Convention and Exhibition.Indonesia:AAPG,2008:IPA08-171.
[10]Redhead R B,Lumadyo E,Saller A,et al.West Seno field discovery,Makassar Straits,East Kalimantan,Indonesia[C]//Weimer P.Deep-Water Reservoirs of the World:SEPM Gulf Coast Section 20th Annual Research Conference.Indonesia:IPA,2000:862.
[11]Peters K E,Fraser T H,Amris W,et al.Geochemistry of crude oils from eastern Indonesia[J].AAPG bulletin,1999,83(12):1927-1942.
[12]史卜庆,徐宁,鲁银涛,等.印尼库泰盆地新成藏组合的发现及其石油地质意义[C]//童晓光.跨国油气勘探开发研究论文集.北京:石油工业出版社,2015:118-127.Shi Boqing,Xu Ning,Lu Yintao,et al.The discovery and petroleum geological significance of the newly formed assemblage in the kutai basin of Indonesia[C]//Tong Xiaoguang.International Oil and Gas Exploration and Development Research Proceedings.Beijing:Petroleum Industry Press,2015:118-127.
[13]Cibaj I.Miocene stratigraphy and paleogeography of lower Kutei Basin,East Kalimantan:A synthesis[C]//Indonesian Petroleum Association.Thirty-Seventh Annual Convention and Exhibition.Indonesia:AAPG,2013:IPA13-G-090.
[14]鲁银涛,栾锡武,史卜庆,等.加里曼丹岛库泰盆地Naga Utara-1井下中新统油、气样品特征分析[J].地质学报,2017,91(4):928-941.Lu Yintao,Luan Xiwu,Shi Boqing,et al.Geochemical analysis of oil and gas sample from well NagaUtara-1in Kutei Basin,Kalimantan Island[J].Acta Geologica Sinica,2017,91(4):928-941.
[15]卢双舫,马延伶,曹瑞成,等.优质烃源岩评价标准及其应用:以海拉尔盆地乌尔逊凹陷为例[J].地球科学-中国地质大学学报,2012,37(3):535-544.Lu Shuangfang,Ma Yanling,Cao Ruicheng,et al.Evaluation criteria of high-quality source rocks and its applications:Taking the Wuerxun sag in Hailaer Basin as an example[J].Earth Science-Journal of China University of Geosciences,2012,37(3):535-544.
[16]Peters K E,Snedden J W,Sulaeman A,et al.A new geochemical-sequence stratigraphic model for the Mahakam Delta and Makassar Slope,Kalimantan,Indonesia[J].American Association of Petroleum Geologists Bulletin,2000,84(1):12-44.
[17]Yensepbayev T,Izart A,Joltaev G,et al.Geochemical characterization of source rocks and oils from the eastern part of the Precaspian and Pre-Uralian Basins(Kazakhstan):Palaeoenvironmental and palaeothermal interpretation[J].Organic Geochemistry,2010,41:242-262.
[18]谢其锋,周立发,刘羽.伊犁盆地二叠系烃源岩地球化学特征及其地质意义[J].石油学报,2014,35(1):50-57.Xie Qifeng,Zhou Lifa,Liu Yu.Geochemistry and geological signification of Permian source rocks in Yili Basin[J].Acta Petrolei Sinica,2014,35(1):50-57.
[19]李玉桓,邬立言,黄九思.储集岩热解地球化学录井评价技术[M].北京:石油工业出版社,1993.Li Yuhuan,Wu Liyan,Huang Jiusi.Geochemical Log Evaluation Technique for Pyrolysis of Reservoir Rocks[M].Beijing:Petroleum Industry Press,1993.
[20]EspitaliéJ,Deroo G,Marquis F.La pyrolyse RockEval et ses applications,Troisième partie[J].Revue de l’Institut Fran?ais du Pétrole,1986,41(1):73-89.
[21]EspitaliéJ,Deroo G,Marquis F.La pyrolyse RockEval et ses applications,Deuxième partie[J].Revue de l’Institut Fran?ais du Pétrole,1985,40(6):755-784.
[22]陈方举.贝尔凹陷南屯组钙质泥岩地质成因及其石油地质意义[J].东北石油大学学报,2015,39(2):42-53.Chen Fangju.Genesis and petroleum geology signifycance of calcareous mudstone strata of Nantun group in Bei’er sag[J].Journal of Northeast Petroleum University,2015,39(2):42-53.
[23]王玉华,侯启军,孙德君,等.柴达木盆地北缘地区中新生代地层油气生成与资源评价[M].北京:科学出版社,2004.Wang Yuhua,Hou Qijun,Sun Dejun,et al.Hydrocarbon Generation and Resource Evaluation of Mesozoic and Cenozoic Strata in the North Margin of Qaidam Basin[M].Beijing:Science Press,2004.
[24]罗宪婴,赵宗举,孟元林.正构烷烃奇偶优势在油源对比中的应用:以塔里木盆地下古生界为例[J].石油实验地质,2007,29(1):74-77.Luo Xianying,Zhao Zongju,Meng Yuanlin.The application of n-alkane’s odd-even carbon number predominance in oil-source rock correlation:An example of the lower Paleozoic in Tarim Basin[J].Petroleum Geology&Experiment,2007,29(1):74-77.
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