基于PLT测试回归的产量劈分方法在东海气田的应用

Application of Yield Splitting Method Based on PLT Test Regression in East China Sea Gas Field

马恋 李元生 宋刚祥 石美雪 路颖

MA Lian LI Yuansheng SONG Gangxiang SHI Meixue LU Ying

中海石油（中国）有限公司上海分公司，上海　200335

Shanghai Branch of CNOOC (China) Ltd., Shanghai 200335, China

在油气田矿场上，许多生产井实行多层合采。为了准确判断各小层产出量，目前常用的劈分方法有静态法、实验法以及动态法等。各方法或考虑因素单一或过程繁琐，均存在一定局限性。考虑到静态参数最易获得，且测试成本小，该文利用东海气田PLT测试资料，通过建立多元线性模型，对影响气井产量劈分的四个主要静态因素进行了敏感性评级，认为地层系数比和储容系数比影响显著，并回归出基于地层系数比和储容系数比的产量劈分经验公式。该方法应用于东海地区新气田，计算出的产出剖面与PLT测试结果之间的误差不超过5%，大幅提高了传统静态劈分法的精度，具有一定的推广应用价值。

In oil and gas field mines, many production wells are multi-layer co-mining. In order to accurately determine the output of each small layer, 3 splitting methods are commonly used: static method, dynamic method and experimental method. Each method has limitations due to single considerations or cumbersome processes. Considering that static parameters are the easiest data to obtain and the test of which cost less, this paper uses the PLT test data of East China Sea gas field to establish a multivariate linear model to evaluate the sensitivity of four main static factors affecting the production splitting of gas wells, and considers that the formation coefficient ratio and reservoir capacity coefficient ratio have a significant impact, then returns the empirical formula of yield splitting based on the formation coefficient ratio and reservoir coefficient ratio. The new method is applied to the new gas field in East China Sea, and the error between the calculated output profile and the PLT test result does not exceed 5%. The accuracy of the traditional static splitting method is greatly improved, and it has certain promotion and application value.

中海石油（中国）有限公司综合科研“西湖凹陷在生产油气田中后期综合调整关键技术研究与实践”（CNOOC-KJ 135 ZDXM 39 SH03）。

https://doi.org/10.3969/j.issn.1008-2336.2023.02.039