西南石油大学学报(自然科学版) ›› 2022, Vol. 44 ›› Issue (2): 31-39.DOI: 10.11885/j.issn.1674-5086.2020.01.07.01

• 地质勘探 • 上一篇    下一篇

深层致密砂岩气藏有效储层的分类评价方法

赵军1, 吴博深1, 武延亮2, 陈伟中3, 赵新建3   

  1. 1. 西南石油大学地球科学与技术学院, 四川 成都 610500;
    2. 陕西延长石油集团有限责任公司采气一厂, 陕西 延安 716000;
    3. 中国石油塔里木油田分公司勘探开发研究院, 新疆 库尔勒 841000
  • 收稿日期:2020-01-07 发布日期:2022-04-22
  • 通讯作者: 赵军,E-mail:zhaojun_70@126.com
  • 作者简介:赵军,1970年生,男,汉族,四川盐亭人,教授,博士,主要从事岩石物理及油气测井储层解释与评价方面的研究工作。E-mail:zhaojun_70@126.com
    吴博深,2000年生,男,汉族,安徽池州人,博士研究生,主要从事油气测井解释与评价工作。E-mail:1494843088@qq.com
    武延亮,1992年生,男,汉族,陕西延安人,硕士,主要从事油气测井和地质研究。E-mail:794914152@qq.com
    陈伟中,1969年生,男,汉族,浙江诸暨人,高级工程师,硕士,主要从事测井解释、测井储层参数方面的研究工作。E-mail:chenwztlm@petrochina.com.cn
    赵新建,1985年生,男,汉族,湖北随州人,工程师,硕士,主要从事测井解释与评价方面的研究工作。E-mail:zhaoxjtlm@petrochina.com.cn
  • 基金资助:
    中国石油天然气股份有限公司重大科技专项(2018E-1810)

Classification and Evaluation of Effective Reservoirs in Deep Tight Sandstone Gas Reservoirsin

ZHAO Jun1, WU Boshen1, WU Yanliang2, CHEN Weizhong3, ZHAO Xinjian3   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Yanchang No.1 Gas Production Plant, Yanchang Petroleum Group Company, Yan'an, Shaanxi 716000, China;
    3. Exploration and Development Research Institute, Tarim Oilfield Branch of Petrochina, Korla, Xinjiang 841000, China
  • Received:2020-01-07 Published:2022-04-22

摘要: 深层致密砂岩有效储层的分类评价是致密砂岩气藏评价的重要环节。致密砂岩由于孔渗极低,且资料的品质难以保证,利用物性参数评价储层品质存在着一定的局限性。依据油气藏充注理论,结合储盖组合关系,利用研究区毛管压力资料,结合地层有效应力数据,建立了目的层的砂、泥孔喉半径计算模型,在此基础上利用聚类分析和正态统计方法,建立了有效储层的判别标准。研究认为,致密砂岩的有效储层与相邻盖层之间存在着较大的毛管压力差,即砂泥孔喉比大。研究区有效储层的砂泥孔喉比界限值随深度的增加而有增大的趋势,且储层质量越好,砂泥孔喉比越大。实际资料应用表明,利用砂泥岩孔喉半径比值能够有效地指示储层的有效性,通过与测试产量对比,所建立的储层分类划分标准能够对研究区有效储层进行分类划分。

关键词: 致密砂岩, 有效储层, 孔喉半径, 分类评价, 聚类分析

Abstract: Classification and evaluation of effective reservoirs in deep tight sandstone is an important step in tight sandstone oil and gas evaluation. Due to the extremely low porosity and permeability of tight sandstone and the difficulty in guaranteeing the quality of the data, there are some limitations in the evaluation of reservoir quality by physical property parameters. According to the theory of reservoir filling and the combination relationship between reservoir and cap, based on the capillary pressure data of the study area and the effective stress data of the stratum, the calculation model of pore throat radius of sand and mud in the target stratum is established. It is considered that there is a large capillary pressure difference between the effective reservoir of tight sandstone and the adjacent cap, that is, the ratio of sand to mud pore throat is large. The limit value of sand/mud pore throat ratio of effective reservoir in the study area tends to increase with the increase of depth, and the better the reservoir quality is, the bigger the sand/mud pore throat ratio is. The application of practical data shows that the ratio of pore throat radius of sand and mudstone can effectively indicate the effectiveness of the reservoir, and the established reservoir classification criteria can be used to classify the effective reservoir in the study area by comparing with the tested output.

Key words: tight sandstone, effective reservoir, pore throat radius, classified evaluation, clustering analysis

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