霸集录8货 2017年6月
文章编号：1001-3873(2017)03-0358-05
新疆石油地质
XINJIANG PETROLEUM GEOLOGY DOI: 10.7657/XJPG20170318
Vol. 38. No.3 Jun.2017
应用改进的产能模拟法确定安岳气田磨溪区块
储集层物性下限王"，杨胜来"，徐伟”，孟展"，韩伟"，钱坤
（1.中国石油大学石油工程教育部重点实验室，北京102249；2.中国石油西南油气田分公司勘探开发研究院，成都610041）
摘要：常规产能模拟法是在确定气蔬储集层物性下限过程中近仪地将单井生产压差设定为产能模拟的实验压差，但由于岩心尺度与单并控制区域尺度相差较大，导致岩心出口端的流体流速与油气并并简端的流体流速并不相等，使预测结果误差较大。为此，对常规产能模拟法进行改进，在进行产量相似换算之前加入了压差相仪转换，根据换算
将改进的产能模拟法应用到安岳气田磨溪区块以确定储集层物性下
后的结果设定实验压差，确保流体流速相等。：
限。研究结果表明，在气并生产压差为6.0MPa，产层有效厚度为40m的条件下，利用改进的产能模拟法确定的孔隙度下限为2.74%，渗透率下限为0.015mD；常规产能模拟法确定的孔隙度下限为2.42%，渗透率下限为0.011mD；改进
的产能模拟法确定的储集层物性下限值要稍高一些。改进的产能模拟法确定的储集层物性下限更加准确、关键词：安岳气田；磨溪区块；产能模拟法；储集层物性下限；压差转换
中图分类号：TE37
文献标识码：A
Application of Improved Productivity Simulation Method inDetermination of the Lower Limits
of Reservoir Physical Properties in Moxi District of An'yue Gas Field
WANG Lu', YANG Shenglai', XU Wei', MENG Zhan', HAN Wei', QIAN Kun
(1.MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; 2.Research Institute of
Exploration and Development, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610041, China)
Abstract: During the process of determination of the lower limits of gas reservoir physical properties with conventional productivity simula-tion method, the well producing pressure differential is approximately set as the experimental pressure differential for productivity simula-tion. However, the core size and single well control area are quite different, resulting in the fluid flow rate at core outlet-end not equal to that at wellbore end, leading to relatively large error in predicted results. Therefore, the conventional productivity simulation method should be improved. Similarity transformation of pressure dfferential is added before production similarity conversion, based on which experimental pressure differential is set to guarantee the equal fluid flow rate. The improved productivity simulation method is used to determine the lower limits of reservoir physical properties in Moxi district of An' yue gas field. The result shows that the lower limits of porosity and permeability determined by the improved productivity simulation method are 2.74% and 0.015 mD, respectively when the producing pressure differential is 6 MPa and the net pay thickness is 40 m in gas wells; while the lower limits of porosity and permeability determined by the conventional productivity simulation method are 2.42% and 0.011 mD, respectively, which is slightly lower than those determined by the improved meth-od. The lower limits of reservoir physical properties determined by the improved productivity simulation method are more accurate.
Keywords: An'yue gas field; Moxi district; productivity simulation method; lower limit of reservoir physical property; pressure differential
transformation
油气田现场确定储集层物性下限的方法有许多，常见的包括经验统计法、孔渗关系法、最小流动孔喉半径法、产能模拟法、试油试气法、相渗曲线法、测井参数法等-明，其中，产能模拟法是指利用研究区实际储集层岩心，在实验室条件下模拟储集层温压条件，并沿水平方向设定不同的生产压差，获得单向流动条件下的油气渗流速度，再转换为径向流动条件下的单井日产油气量"-，转换公式为
收稿日期：2016-10-27
修订日期：2017-03-23
=
69.12Qsr,d,
D
(1)
产能模拟法通常用于对其他方法确定的储集层物性下限的准确性进行验证，或者在试油试气资料较少的情况下对储集层物性下限进行预测。但是，利用产能模拟法确定的储集层物性下限值普遍偏低，油气田现场按照此下限值进行试油试气时往往达不到预期的产量，因为(1)式是以岩心出口端流体流速与油
基金项目：国家973项日（2015CB250900)；国家科技重大专项（2016ZX05015-003）
作者简介：王璐（1991-），男，山东聊城人，博士研究生，油气田开发工.程，（Tel)18511908264(E=mail)wlhmhxydh@163.com 万方数据