油页岩岩性非均质性特征及地球物理精细刻画——以苏北盆地溱潼凹陷阜宁组二段为例

doi:10.11743/ogg20150513

摘要/Abstract

摘要： 为了阐明苏北盆地溱潼凹陷阜宁组二段油页岩岩性非均质性特征及时空展布规律，应用岩心、测井、地化测试和三维地震资料，从岩石类型、测井曲线、总有机碳含量和矿物组分4个方面将油页岩岩性划分为黑色泥岩、粉砂质泥岩和灰质泥岩3类。在此基础上以层序划分为标准，利用岩相流体概率分析技术开展油页岩岩性时空预测研究，并结合实际录井资料验证了预测结果的准确性和可靠性。预测结果揭示出早期湖扩体系域时期，灰质泥岩在工区内广泛发育，粉砂质泥岩仅局限于凹陷西南部，随湖平面上升，灰质泥岩局限于凹陷中部，粉砂质泥岩集中发育于凹陷西南和东北两处，并可见黑色泥岩连片发育；晚期湖扩体系域时期，凹陷内以黑色泥岩发育为主，灰质泥岩呈零星分布，粉砂质泥岩集中发育于工区西南部和北部。以上技术方法和实践应用表明，岩相流体概率分析技术能够准确预测油页岩岩性非均质性时空展布特征，对油页岩勘探开发具有重要意义。

关键词: 非均质性, 岩相流体概率, 油页岩, 阜宁组, 溱潼凹陷

Abstract: In order to illustrate the lithologic heterogeneity characteristics and spatial-temporal distribution of oil shale of the 2^nd Member of Funing Formation in Qintong sag,Subei Basin,this paper makes research on lithology heterogeneity of shale through cores,well logging,geochemical tests and 3D seismic data.After analyzing rock type,well logs,TOC and mineral contents,the oil shale is divided into black shale,silty mudstone and lime mudstone.After the research on lithology division and isochronous sequence stratigraphic framework,Facies and Fluids Probabilities(FFP)method is used to predict the spatial-temporal distribution of various lithologies within the oil shale,and the prediction results are confirmed by the real logging data.The results indicate that in the early expansion system tract,lime mudstone widely deve-loped in the research area,meanwhile silty mudstone only developed in the southwest of Qintong sag.With the lake level rising,lime mudstone developed in the central sag and silty mudstone developed in the southwest and northeast of the sag.Black shale deposited in the entire area.In the late expansion system tract,black shale was widely deposited in the sag,while lime mudstone developed sporadically and silty mudstone only developed in the southwest and northeast of the sag.In conclusion,FFP can accurately predict the temporal and spatial distribution of various lithologies within oil shale,which has important significance for the exploration and development of oil shale.

Key words: heterogeneity, facies and fluids probabilities(FFP), oil shale, Funing Formation, Qintong sag

中图分类号:

TE311

王超,陆永潮,杜学斌,等. 油页岩岩性非均质性特征及地球物理精细刻画——以苏北盆地溱潼凹陷阜宁组二段为例[J]. 石油与天然气地质, 2015, 36(5): 814-821. doi: 10.11743/ogg20150513 Wang Chao,Lu Yongchao,Du Xuebin,et al. Characteristics and geophysical prediction of lithology heterogeneity of oil shale: Taking the 2^nd Member of Funing Formation of Qintong sag, Subei Basin,as an example[J]. Oil & Gas Geology, 2015, 36(5): 814-821. doi: 10.11743/ogg20150513

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