Technology of identification for hydrocarbon source and its application in reformed sag: a case study of Xijiang Main Sag
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摘要:
以西江主洼为例，抓住洼陷结构控制沉积体系发育的核心思想，在层序地层、生长地层、构造演化、剥蚀改造、地震相和沉积相等综合研究基础上，总结了一套适用于改造型洼陷的烃源规模识别技术：① 考虑控制沉积期湖盆分布广度和沉积厚度的构造参数，拟合一套计算方法用来半定量化计算烃源规模随控洼断裂走向的变化趋势；② 在层序格架下，以生长地层理论、构造演化分析和剥蚀改造模型为依据，确立洼陷内不同位置差异构造活动特征，并在此基础上从构造差异活动控差异沉积角度定性预测烃源岩的空间分布特征；③ 半定量化计算与定性分析相互佐证，形成一套适用于改造型洼陷的烃源规模识别技术。利用该项技术对西江主洼的烃源规模进行评价，对西江主洼及类似洼陷的油气勘探具有指导意义。
Abstract:Combing studies in sequence stratigraphy, growth strata, tectonic evolution, denudation transformation, seismic facies, and sedimentary facies, we summarized the technology for identification of hydrocarbon source rock applicable for reformed sags in the case of the Xijiang Main Sag of the Pearl River Mouth Faulted Basin. Based on the growth stratigraphy, tectonic evolution, and erosion history, differential tectonic activities were characterized at different locations of the sag in the sequence framework, on which the spatial distribution of source rocks were qualitatively predicted in perspective of differential tectonics and sedimentation. Meanwhile, considering the structural parameters controlling the distribution breadth and sediment thickness in the half-graben basins, an equation was established to semi-quantitatively calculate the tendency of variation of hydrocarbon source scale vs the strikes of controlling faults. In addition, the results of semi-quantitative calculation and qualitative analysis were compared and testified each other, from which a set of hydrocarbon source identification technology were proposed to evaluate the source rocks in the Xijiang Main Sag, and good results have been achieved.
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[1] 母国妍,钟宁宁,刘宝,等. 湖相泥质烃源岩的定量评价方法及其应用[J]. 石油学报,2010,10(3):218-226.
[2] 王建,马顺平,罗强,等. 渤海湾盆地饶阳凹陷烃源岩再认识与资源潜力分析[J]. 石油学报,2009,30(1):51-55. doi: 10.3321/j.issn:0253-2697.2009.01.009
[3] 姜雪,吴克强,刘丽芳,等. 构造活动对富生油凹陷烃源岩的定量控制:以中国近海古近系为例[J]. 石油学报,2014,35(3):455-461. doi: 10.7623/syxb201403006
[4] 薛良清. 层序地层分析在裂谷盆地油气勘探中的应用[J]. 石油学报,2000,5(2):7-11.
[5] 刘震,常迈,赵阳,等. 低勘探程度盆地烃源岩早期预测方法研究[J]. 地学前缘,2007,14(4):159-168. doi: 10.3321/j.issn:1005-2321.2007.04.017
[6] 吴玉坤,胡明毅,柯岭,等. 利用地震相识别优质烃源岩:以辽中凹陷沙三段为例[J]. 沉积学报,2013,2(8):366-373.
[7] 茹克. 裂陷盆地的半地堑分析[J]. 中国海上油气(地质),1990,4(6):1-10.
[8] 赵贤正,柳广第,金凤鸣,等. 小型断陷湖盆有效烃源岩分布特征与分布模式:以二连盆地下白垩统为例[J]. 石油学报,2015,36(6):641-654. doi: 10.7623/syxb201506001
[9] 徐思煌,梁浩然,刘晓霞. 生烃凹陷资源潜力快速评价新指标:烃源指数[J]. 地球科学与环境学报,2017,39(2):238-248. doi: 10.3969/j.issn.1672-6561.2017.02.008
[10] 杨伟利,姜在兴,操应长,等. 陆相湖盆可容纳空间转换特征[J]. 石油天然气学报(江汉石油学院学报),2010,32(2):11-18.
[11] 漆家福, 夏义平, 杨娇. 油区构造解析[M]. 北京: 石油工业初版社, 2006, 4（1）: 25-39.
[12] 施和生, 舒誉, 杜家元, 等. 珠江口盆地古近系石油地质[M]. 北京: 地质出版社, 2017.
[13] 梁杰,张向涛,许新明,等. 珠江口盆地番禺4洼古近系文昌组构造变形特征及成因机制[J]. 现代地质,2018,32(4):750-759.
[14] REN J,TAMAKI K,LI S,et al. Late Mesozoic and Cenozoic rifting and its dynamic setting in Eastern China and adjacent areas[J]. Tectonophysics,2002,344(3/4):175-205.
[15] NORTHRUP C J, ROYDEN L H, BURCHFIEL B C. Motion of the Pacific plate relative to Eurasia and its potential relation to Cenozoic extrusion along the eastern margin of Eurasia [J]. Geology. 1995, 23（8）: 719-722.
[16] 龚晓峰,何家雄,莫涛,等. 珠江口盆地珠一坳陷惠陆油区含油气系统与油气运聚成藏模式[J]. 天然气地球科学,2015,26(12):2292-2303. doi: 10.11764/j.issn.1672-1926.2015.12.2292
[17] 刘培,张向涛,杜家元,等. 低地温断陷构造-热演化过程及其石油地质意义:以珠江口盆地西江主洼为例[J]. 地质科技情报,2018,2(37):149-156.
[18] 杜家元,施和生,朱明,等. 西江主洼相对低地温条件下油气成藏特征和勘探潜力分析[J]. 中国海上油气,2008,20(5):287-292. doi: 10.3969/j.issn.1673-1506.2008.05.001
[19] 郭卫星,漆家福. 同沉积褶皱生长地层中沉积与构造关系[J]. 现代地质,2008,22(4):520-525. doi: 10.3969/j.issn.1000-8527.2008.04.005
[20] SUPPE J, CHOU G T, HOOK S C. Rate of folding and faulting determined from growth strata[M]. New York: Chapman & Hall, 1992: 105-122.
[21] 龚再升, 杨甲明. 中国近海大油气田[M]. 北京: 石油工业出版社, 1997.
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