多层段致密砂岩气藏有利区评价方法再认识

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石油化工应用 2019 年ห้องสมุดไป่ตู้
第 38 卷
ing layer is calculated by weighting. Finally, the economic development limits of the compos原 ite index are defined according to the economic limit evaluation. This method transforms the optimal selection of favorable area from traditional "multi-layer qualitative description" to "normalized layer quantitative characterization", which has been widely used in the high ef原 ficiency and scale development of Shenmu gasfield. Key words：tight sandstone；multi -layers gas；favorable area；comprehensive index method； PI factor；weight coefficient
Oil/Gas Fields Exploration and Development，Xi'an Shaanxi 710021，China）
Abstract :Many gasfields in Ordos basin, such as Shenmu, Mizhi and Sulige, all have the characteristics of multi-layer gas bearing, and all belong to typical tight sandstone gas reser原 voirs. In view of the difficulties in the development of this kind of gas reservoir, taking Shenmu gasfield as an example, based on the previous research results, the concept of PI factor is introduced to further optimize and perfect the evaluation method of favorable area of multi-layer tight sandstone gas reservoir.Firstly, the geological parameters related to singlelayer productivity are optimized for normalization and their influence weights are analyzed, and the evaluation criteria for single-layer favorable areas are established. Secondly, accord原 ing to the single-layer PI factor, combined with the gas production profile test, the produc原 tivity contribution weight of different layers is defined,and then the composite index of stack原
* 收稿日期：圆园员9原05-21 基金项目：国家科技重大专项“复杂天然气藏开发关键技术”，项目编号：2016ZX05015。 作者简介：付晓燕（1978-），女，工程师，硕士研究生，2006 年毕业于西北大学矿产普查与勘探专业，现主要从事气田开发研 究工作，邮箱：fuxy1_cq@。
Vol.38 No.愿 粤怎早. 2019
石油化工应用 PETROCHEMICAL INDUSTRY APPLICATION
第 38 卷 第 愿 期 2019 年 愿 月
多层段致密砂岩气藏有利区评价方法再认识
付晓燕 1，2，王彦卿 1，黄有根 1，2，王德龙 1，2
（员援中国石油长庆油田分公司勘探开发研究院，陕西西安 710021； 圆援低渗透油气田勘探开发国家工程实验室，陕西西安 710021）
Recognition of evaluation method for favorable area of multi-layer tight sandstone gas reservoir
FU Xiaoyan1，2，WANG Yanqing1，HUANG Yougen1，2，WANG Delong1，2 （1.Research Institute of Exploration and Development，PetroChina Changqing Oilfield Company，Xi'an Shaanxi 710021，China；2.State Engineering Laboratory of Low-Permeability
摘 要：鄂尔多斯盆地神木、米脂、苏里格等多个气田都具有多层段含气的特征，且都属于典型的致密砂岩气藏。针对该 类气藏开发难点，本次以神木气田为例，基于前人研究成果，引入 PI 因子的概念，进一步优化完善多层段致密砂岩气藏 有利区评价方法。首先，优选与单层产能有关的地质参数进行归一化并分析其影响权重，建立单层有利区评价标准；其 次，依据单层 PI 因子，结合产气剖面测试，明确不同层段的产能贡献权重，进而加权求取叠合层综合指数；最后，根据经 济极限评价，明确综合指数经济开发界限。该方法使得有利区优选由传统的“多层定性描述”转变为现在实用的“归一层 定量表征”，在神木气田的高效、规模开发中得到了广泛应用。 关键词：致密砂岩；多层段含气；有利区；综合指数法；PI 因子；权重系数 中图分类号：TE375 文献标识码：A 文章编号：1673-5285（201怨）园8-0013-05 DOI:10.3969/j.issn.1673-5285.201怨.园8.004