白豹—南梁地区长4+51油藏主控因素及富集规律

doi:10.11885/j.issn.1674-5086.2020.08.26.02

西南石油大学学报(自然科学版) ›› 2022, Vol. 44 ›› Issue (6): 29-42.DOI: 10.11885/j.issn.1674-5086.2020.08.26.02

白豹—南梁地区长_4+5₁油藏主控因素及富集规律

肖正录^1,2,3, 路俊刚^1,2,3, 廖建波^3,4, 李勇^1,2,3, 陈世加^1,2,3

1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500;
2. 天然气地质四川省重点实验室, 四川成都 610500;
3. 西南石油大学地球科学与技术学院, 四川成都 610500;
4. 中国石油勘探开发研究院西北分院, 甘肃兰州 730020

收稿日期:2020-08-26 出版日期:2022-12-10 发布日期:2023-01-16
通讯作者: 路俊刚,E-mail:lujungang21@sohu.com
作者简介:肖正录,1994年生,男,汉族,甘肃武威人,博士,主要从事非常规油气地质等方面的研究。E-mail:xiaozl@163.com
路俊刚,1980年生,男,汉族,山东潍坊人,教授,博士生导师,主要从事油气地质与成藏地球化学方面的研究。E-mail:lujungang21@sohu.com
廖建波,1979年生,男,汉族,四川阆中人,高级工程师,博士研究生,主要从事沉积学和油气地质等方面的研究工作。E-mail:liao_jb@petrochina.com.cn
李勇,1993年生,男,汉族,四川广元人,讲师,博士,主要从事油气地球化学及成藏方面的研究。E-mail:1041257867@qq.com
陈世加,1964年生,男,汉族,广东大埔人,教授,博士生导师,主要从事油气地球化学及成藏方面的研究和教学工作。E-mail:chensj1964@sina.com
基金资助:
国家自然科学基金（42072185，41872165）

Main Controlling Factors and Enrichment Mechanism of Chang 4+5₁ Reservoir in Baibao-Nanliang Area, Ordos Basin

XIAO Zhenglu^1,2,3, LU Jungang^1,2,3, LIAO Jianbo^3,4, LI Yong^1,2,3, CHEN Shijia^1,2,3

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Natural Gas Geology Key Laboratory of Sichuan Province, Chengdu, Sichuan 610500, China;
3. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
4. Northwest Branch, PetroChina Research Institute of Petroleum Exploration & Development, Lanzhou, Gansu 730020, China

Received:2020-08-26 Online:2022-12-10 Published:2023-01-16

摘要/Abstract

摘要： 鄂尔多斯盆地延长组油藏普遍高产水是油田精细勘探中面临的主要难题之一。以白豹—南梁地区长_4+5₁油藏为研究对象，通过对烃源岩条件、砂体类型、储层特征、裂缝特征及遮挡条件等成藏主控因素的对比分析，探讨了油藏差异富集的规律。研究认为，白豹地区分布于三角洲下平原和前缘主体带前部，砂体类型主要为水下分流河道，砂体厚度大、渗透率高、侧向延伸远。得益于物性较好的大规模连通性砂体，油水分异充分，原油在浮力作用下向构造高部位运移，导致砂体虽有油气显示，但普遍高含水的特征，低幅度构造是此区域有利的勘探目标。南梁地区分布于三角洲前缘末端，以断续河道和河口坝砂体为主，砂体相对孤立、物性较差、岩性变化频繁。孤立砂体的自生圈闭条件好，油气难以侧向运移，富集程度相对较高，垂向运移通道通畅和储层物性较好的砂体，是此区域的有利勘探目标。

关键词: 白豹-南梁, 差异聚集, 富集规律, 岩性油藏, 长_4+5₁油藏

Abstract: The high water production rate of Yanchang Formation reservoirs in Ordos Basin is one of the main problems in the fine exploration of oilfield. The Chang 4+5₁ Reservoir in the Baibao-Nanliang Area is taken as the research object. Through the comparative analysis of source rock conditions, sand body types, reservoir characteristics, fracture characteristics, and shielding conditions, the enrichment rules of oil reservoirs are discussed. The results show that the Baibao Area is distributed in the lower delta plain and the near source part of delta front, and the sand body type is mainly underwater distributary channel with large thickness, high permeability, and long lateral extension. Due to the large-scale connectivity sand body with good physical properties, the crude oil migrated laterally to the high part of the structure under the action of buoyancy, resulting in the oil-bearing core producing water. Low amplitude structure is a favorable exploration target in this area. Nanliang Area is distributed at the end of the delta front, mainly composed of mouth-bar sand body. The sand body is relatively isolated, the physical properties are relatively poor and the lithology changes frequently. It is difficult for crude oil to migrate laterally due to the good conditions of authigenic traps in isolated sand bodies. Sand bodies with smooth vertical migration channels and good reservoir physical properties are favorable exploration targets in this area.

Key words: Baibao-Nanliang, differential accumulation, enrichment law, lithologic reservoir, Chang 4+5₁ Reservoir

中图分类号:

TE122

肖正录, 路俊刚, 廖建波, 李勇, 陈世加. 白豹—南梁地区长_4+5₁油藏主控因素及富集规律[J]. 西南石油大学学报(自然科学版), 2022, 44(6): 29-42.

XIAO Zhenglu, LU Jungang, LIAO Jianbo, LI Yong, CHEN Shijia. Main Controlling Factors and Enrichment Mechanism of Chang 4+5₁ Reservoir in Baibao-Nanliang Area, Ordos Basin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(6): 29-42.

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白豹—南梁地区长_4+5₁油藏主控因素及富集规律

Main Controlling Factors and Enrichment Mechanism of Chang 4+5₁ Reservoir in Baibao-Nanliang Area, Ordos Basin

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