Hydrocarbon Accumulation Feature and Exploration Direction Selection:Taking M Block of Oriente Basin, Ecuador as an Example

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  • PetroChina Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China

Received date: 2013-04-22

  Revised date: 2013-06-20

  Online published: 2014-03-10

Abstract

M block is a major hydrocarbon production area in Oriente Basin of Ecuador,while future exploration direction and targets of the block are unclear.Studies on hydrocarbon accumulation of the block should be carried out immediately.Based on the comprehensive drilling data,logging data and well test,the paper systematically analyzes 17 reservoirs of M block and proposes the hydrocarbon distribution regulation and accumulation features,and figures out the future exploration area.The research shows that:(1)Structural background and fault have obvious controlling function on hydrocarbon distribution.Oil reservoirs all locate on the first structural belt near M fault and are mainly structural ones;(2)Trap fullness degree(FD)has obvious regulation in plane which decreases from north to south.The FD in northern part such as M4A_01,M4A_02,M4A_03,M4A_09,M_21,M_01 are as high as 1,while the FD of M15 in southern area is intermediate of 0.59,and the FD of M16 in the south edge is 0 which means no charging;(3)The OWC of the reservoirs step up from north to south;(4)Crude oil API degree decreases from north to south.All these accumulation features match the differential entrapment theory,based on which,a hydrocarbon accumulation model is established where hydrocarbon migrates along the structural belt and accumulates in a multistep way,i.e.,hydrocarbon sourced from the northern kitchen,migrated along the structural ridge and was entrapped in multistep traps.The northern part of M block,locates on the hydrocarbon migration path and close to source kitchen,has good accumulation condition and is the favorable area for future exploration.
 

Cite this article

MA Zhong-zhen,XIE Yin-fu,CHEN He-ping,ZHANG Zhi-wei,ZHOU Yu-bing,WANG Dan-dan,LIU Ya-ming,YANG Xiao-fa . Hydrocarbon Accumulation Feature and Exploration Direction Selection:Taking M Block of Oriente Basin, Ecuador as an Example[J]. Natural Gas Geoscience, 2014 , 25(3) : 379 -387 . DOI: 10.11764/j.issn.1672-1926.2014.03.379

References

[1]Mathalone J M P,Montoya R M.Petroleum geology of the sub-andean basins of Peru[C]//Tankard A J,Suárez R S,Welsink H J.Petroleum Basins of South America.Tulsa:AAPG Press,1995:423-444.

[2]Zou Caineng,Tao Shizhen.Connotation,classification,formation and distribution of giant oil and gas province[J].Petroleum Exploration and Development,2007,34(1):5-12.[邹才能,陶土振.大油气区的内涵、分类、形成和分布[J].石油勘探与开发,2007,34(1):5-12.]

[3]Zou Caineng,Zhang Guangya,Tao Shizhen,et al.Geological features,major discoveries and unconventional petroleum geology in the global petroleum exploration[J].Petroleum Exploration and Development,2010,37(2):129-145.[邹才能,张光亚,陶士振,等.全球油气勘探领域地质特征、重大发现及非常规石油地质[J].石油勘探与开发,2010,37(2):129-145.]

[4]Xie Yinfu,Ji Hancheng,Su Yongdi,et al.Petroleum geology and exploration potential of Oriente-Maranon Basin[J].Petroleum Exploration and Development,2010,37(1):51-56.[谢寅符,季汉成,苏永地,等.Oriente-Maranon盆地石油地质特征及勘探潜力[J].石油勘探与开发,2010,37(1):51-56.]

[5]Wang Qing,Zhang Yinghong,Zhao Xinjun,et al.Petroleum geological characteristics and exploration potential analysis of Maranon Basin,Peru [J].Petroleum Exploration and Development,2006,33(5):643-647.[王青,张映红,赵新军,等.秘鲁Maranon盆地油气地质特征及勘探潜力分析[J].石油勘探与开发,2006,33(5):643-647.]

[6]Liu Yaming,Xie Yinfu,Ma Zhongzhen,et al.The exploration potential and accumulation characteristics of Paleozoic gas of foreland basins in South America[J].Natural Gas Geoscience,2012,23(6):1045-1053.[刘亚明,谢寅符,马中振,等.南美前陆盆地古生界天然气成藏特征及勘探潜力分析[J].天然气地球科学,2012,23(6):1045-1053.]

[7]Zhang Shen,Tian Shicun,Guo Jianyu,et al.Evaluation of petroleum exploration potential in Ucayali Basin,Peru[J].Natural Gas Geosciences,2012,23(2):268-278.[张申,田世存,郭建宇,等.秘鲁乌卡亚利盆地油气勘探潜力分析[J].天然气地球科学,2012,23(2):268-278.]

[8]Pindell J L,Tabbutt K D.Mesozoic-Cenozoic Andean paleogeography and regional controls on hydrocarbon systems[C]//Tankard A J,Suarez S R,Welsink H J.Petroleum Basins of South America.Tulsa:AAPG Press,1995:101-128.

[9]Canfield R W,Bonilla G,Robbins R K.Sacha oil field of ecuadorian oriente[J].AAPG Bulletin,1982,66(8):1076-1090.

[10]Dashwood M F,Abbotts I L.Aspects of the petroleum geology of the Oriente Basin,Ecuador[C]//Brooks J.Classic petroleum provinces.London:Geological Society Press,1990:89-117.

[11]Marksteiner R,Aleman A M.Petroleum systems along the fold belt associated to the Maranon-Oriente-Putumayo foreland basins[J].AAPG Bulletin,1996,80(8):1311.

[12]Feininger T.Origin of petroleum in the Oriente of Ecuador[J].AAPG Bulletin,1975,59(7):1166-1175.

[13]Valasek D,Aleman A M,Antenor M,et al.Cretaceous sequence stratigraphy of the Maranon-Oriente- Putumayo Basins,northeastern  Peru,eastern Ecuador,and southeastern Colombia[J].AAPG Bulletin,1996,80(8):1341-1342.

[14]Shanmugam G,Poffenberger M,Toro Alava J.Tide dominated estuarine facies in the Hollin and Napo(“T”and“U”)Formation(Cretaceous),Sacha field,Oriente Basin,Ecuador [J].AAPG Bulletin,2000,84(5):652-682.

[15]Lee G H,Eissa M A,Decker C L,et al.Aspects of the petroleum geology of the Bermejo field,northwestern Oriente Basin,Ecuador[J].Journal of Petroleum Geology,2004,27(4):335-356.

[16]Balkwill H R,Paredes F I,Rodrigue G,et al.Northern part of Oriente Basin,Ecuador:Reflection seismic expression of structures[C]//Tankard A J,Suarez S R,Welsink H J.Petroleum basins of South America.Tulsa:AAPG Press,1995:559-571.

[17]White I C.The geology of natural gas[J].Sciences,1885,(5):521-522.

[18]Gussow W C.Differential entrapment of gas and oil:A fundamental principle[J].AAPG Bulletin,1954,38(5):816-853.

[19]Schwalter T T.Mechanics of secondary hydrocarbon migration and entrapment[J].AAPG Bulletin,1979,63(5):723-760.

[20]Luo Xiaorong.Understanding on dynamical studies of hydrocarbon migration and accumulation[J].Natural Gas Geosciences,2008,19(2):149-156.[罗晓容.油气成藏动力学研究之我见[J].天然气地球科学,2008,19(2):149-156.]

[21]Jiang Lin,Hong feng,Liu Shaobo,et al.Physical simulation of oil and natural gas secondary migration[J].Natural Gas Geosciences,2011,22(5):784-788.[姜林,洪峰,柳少波,等.油气二次运移过程差异物理模拟实验[J].天然气地球科学,2011,22(5):784-788.]

[22]Fustic M, Bennett B, Huang H,et al.Differential entrapment of charged oil:New insights on Mcmurray Formation oil trapping mechanisms[J].Marine and Petroleum Geology,2012,36:50-69.

[23]Arouri K,Panda S K,Satti S A,et al.Migration tracers reveal long-range migration in the summan exploration area[C]//Ternational Meeting of Organic Geochemistry.Interlaken,Switzerland[s.n].2011:229.

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