密井网条件下钙质胶结条带空间展布研究

doi:10.11885/j.issn.16745086.2016.03.24.03

西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (4): 71-80.DOI: 10.11885/j.issn.16745086.2016.03.24.03

密井网条件下钙质胶结条带空间展布研究

吴穹螈^1,2, 吴胜和¹, 秦国省^1,3, 陈诚^1,3, 张佳佳¹

1. 中国石油大学(北京), 北京昌平 102249;
2. 中海石油(中国)有限公司天津分公司, 天津塘沽 300452;
3. 中国石油勘探开发研究院, 北京海淀 100083

收稿日期:2016-03-24 修回日期:2017-03-13 出版日期:2017-08-01 发布日期:2017-08-01
通讯作者: 吴穹螈,E-mail:wu_qy90@126.com
作者简介:吴穹螈,1990年生,男,汉族,四川内江人,硕士,主要从事精细油藏描述与开发地质方面的研究工作。E-mail:wu_qy90@126.com;吴胜和,1963年生,男,汉族,江西抚州人,教授,博士生导师,主要从事储层地质学、油藏表征与建模方面的教学与科研工作。E-mail:reser@cup.edu.cn;秦国省,1988年生,男,汉族,山东济宁人,博士研究生,主要从事精细油藏描述方面的研究工作。E-mail:qin8002008@163.com;陈诚,1990年生,男,汉族,陕西延安人,博士研究生,主要从事储层地质和油藏描述方面的研究工作。E-mail:mqx1415@126.com;张佳佳,1990年生,男,汉族,山东德州人,博士研究生,主要从事储层表征与建模方面的研究工作。E-mail:zhangjiajia0103@gmail.com
基金资助:
国家科技重大专项（2011ZX05009003）；国家自然科学基金（41372116）

Study on Spatial Distribution of Calcite-cemented Strips Under Close Well-spacing Conditions

WU Qiongyuan^1,2, WU Shenghe¹, QIN Guosheng^1,3, CHEN Cheng^1,3, ZHANG Jiajia¹

1. College of Geosciences, China University of Petroleum(Beijing), Changping, Beijing 102249, China;
2. Tianjin Branch of CNOOC Ltd, Tanggu, Tianjin 300452, China;
3. PetroChina Research Institute of Petroleum Exploration & Development, Haidian, Beijing 100083, China

Received:2016-03-24 Revised:2017-03-13 Online:2017-08-01 Published:2017-08-01

摘要/Abstract

摘要： 综合应用铸体薄片、物性分析等资料，以鄂尔多斯盆地华庆地区长8油组为例，对密井网条件下低渗致密砂岩内部的钙质胶结条带进行了研究，明确了其基本特征，阐明了不同位置胶结条带的发育控制因素，建立了密井网条件下钙质胶结条带的空间展布模式。研究表明，华庆地区长8油组砂岩中，钙质胶结条带广泛发育，主要成分为晚期铁方解石。不同发育位置的钙质胶结条带发育主控因素不一，整体胶结式发育主要受控于粒度，中部式主要受侧向临近泥页岩和长石溶蚀影响，顶底式则主要受到粒度和泥页岩发育程度配置关系影响。不同沉积微相组合和构型界面控制了钙质胶结条带的垂向分布，平面上钙质胶结条带主要呈团块状、条带状分布于研究区中部远离物源的分流河道末端及其附近河口坝中部。总体上，密井网条件下钙质胶结条带在空间上呈厚层粗粒砂体内部"顶底胶结厚延伸远中部胶结薄延伸近"和薄层砂体"整体胶结薄延伸近"的展布模式。

关键词: 钙质胶结条带, 控制因素, 空间展布, 密井网, 华庆地区

Abstract: Using data from casting sheet images and physical property analyses, this study investigates calcite-cemented strips in compact sandstones of low-permeability under close well-spaced conditions, as exemplified by the Chang-8 oil formation in the Huaqing area of the Ordos Basin. Specifically, their basic characteristics are analyzed, the controlling factors for the development of them at different locations are identified, and a spatial distribution model for calcite-cemented strips under close well-spacing conditions is built. The results of the study show that calcite-cemented strips were widely developed in the sandstones of the Chang-8 oil formation in the Huaqing area, and mainly comprise late-stage ferrous calcites. The primary controlling factors for their development vary with the location of development. In particular, their development is primarily controlled by granularity, lateral adjacent mud shales and feldspar corrosion in the middle, and by the dispositional relationship between granularity and degree of mud shale development at the top and bottom. Their vertical distribution is controlled jointly by a combination of sedimentary microfacies and a configurational interface. Horizontally, they mainly take on a crumby structure and have a zonal distribution at the end of the distributary river way, far away from the provenance in the middle of the study area, and in the middle of the nearby estuary dam. Overall, the spatial distribution of calcite-cemented strips under the close well-spacing condition is characterized as follows:(1) in the thick-layer coarse-grained sands, calcite cementation is thick and far-stretching at the bottom and top, but thin and near-stretching in the middle; (2) in the thin-layer sands, calcite cementation is thin and near-stretching.

Key words: Calcite-cemented strip, controlling factor, spatial distribution, close well-spacing, Huaqing area

中图分类号:

TE122

吴穹螈, 吴胜和, 秦国省, 陈诚, 张佳佳. 密井网条件下钙质胶结条带空间展布研究[J]. 西南石油大学学报(自然科学版), 2017, 39(4): 71-80.

WU Qiongyuan, WU Shenghe, QIN Guosheng, CHEN Cheng, ZHANG Jiajia. Study on Spatial Distribution of Calcite-cemented Strips Under Close Well-spacing Conditions[J]. 西南石油大学学报(自然科学版), 2017, 39(4): 71-80.

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密井网条件下钙质胶结条带空间展布研究

Study on Spatial Distribution of Calcite-cemented Strips Under Close Well-spacing Conditions

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