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

发布时间：2018-05-05 18:50

本文选题：安岳气田 + 磨溪区块　；参考：《新疆石油地质》2017年03期

【摘要】：常规产能模拟法是在确定气藏储集层物性下限过程中近似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井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井井筒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似转换,根据换算后的结果设定实验压差,确保流体流速相等。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限。研究结果表明,在气井生产压差为6.0 MPa,产层有效厚度为40 m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0.015 mD;常规产能模拟法确定的孔隙度下限为2.42%,渗透率下限为0.011 D;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。
[Abstract]:In the process of determining the lower limit of physical properties of gas reservoir reservoir, the conventional productivity simulation method approximately sets the production pressure difference of single well as the experimental pressure difference of productivity simulation, but the difference between core scale and single well control area scale is large. The flow velocity at the outlet end of the core is not equal to that at the wellbore end of the oil and gas well, which results in a large error in the prediction results. For this reason, the conventional productivity simulation method is improved, the pressure difference similarity conversion is added before the yield similarity conversion is carried out, and the experimental pressure difference is set up according to the result of the conversion, so as to ensure that the flow velocity is equal. The improved productivity simulation method is applied to Moxi block of Anyue gas field to determine the lower limit of reservoir physical properties. The results show that under the condition that the production pressure difference of gas well is 6.0 MPA and the effective thickness of production layer is 40 m, The lower limit of porosity and permeability determined by the improved productivity simulation method is 2.74 and the lower limit of permeability is 0.015 mD. the lower limit of porosity and permeability determined by conventional productivity simulation method is 2.42 and 0.011 Drespectively, and the physical properties of reservoir determined by the improved productivity simulation method The lower limit is slightly higher. The lower limit of reservoir properties determined by the improved productivity simulation method is more accurate.
【作者单位】：中国石油大学石油工程教育部重点实验室;中国石油西南油气田分公司勘探开发研究院;
【基金】：国家973项目(2015CB250900) 国家科技重大专项(2016ZX05015-003)
【分类号】：TE31

【相似文献】