井筒变流量气井携液临界流量的确定方法——以东海西湖凹陷多层合采气井为例

发布时间：2018-11-19 16:51

【摘要】：井筒常流量气井携液临界流量的确定主要取决于井筒的截面面积。对东海西湖凹陷多层合采气井的调查发现,积液面位于井筒生产滑套处的井数占调查井数的39%。为了揭示井筒变流量气井积液的多样性,以东海西湖凹陷多层合采气井为研究对象,从建立区域携液临界流量模型入手,形成了一套由井筒变流量气井携液临界流量的确定方法,包括模型系数值拟合数据的选择、最易产生积液的井筒节点的筛选条件、井筒节点携液临界流量到气井携液临界流量的转化方法等。研究认为:多层合采气井的分段式流量分布,是导致多层合采气井积液现象普遍高于单层开采井,以及积液面通常处于生产滑套处的主要原因,这对多层合采气井的合理配产研究具有一定的借鉴意义。
[Abstract]:The determination of critical flow rate of gas well with constant flow depends on the cross-section area of wellbore. The investigation of multilayer gas production wells in Xihu sag in the East China Sea shows that the number of wells located on the wellbore production and slip casing accounts for 39% of the investigated wells. In order to reveal the diversity of fluid accumulation in gas wells with variable flow in wellbore, taking multilayer gas production wells in Xihu sag in the East China Sea as the research object, starting with the establishment of a regional critical flow model for carrying liquid, A set of methods for determining the critical flow rate of fluid carrying in gas wells with variable flow in wellbore are formed, including the selection of fitting data of model coefficient values, and the screening conditions of wellbore nodes that are most likely to produce fluid accumulations. Transformation method from critical flow rate of wellbore node to critical flow rate of gas well. The results show that the flow distribution of multilayer gas production wells is the main reason that the fluid accumulation in multilayer gas production wells is generally higher than that in single-layer production wells, and that the fluid accumulation surface is usually in the place of production slip sleeve, the main reason is that the fluid accumulation in multi-layer gas production wells is generally higher than that in single-layer production wells. It has some reference significance for the study of rational production of multi-layer gas production wells.
【作者单位】：中海石油(中国)有限公司上海分公司勘探开发研究院;
【基金】：国家重大科技专项“东海深层低渗—致密天然气勘探开发技术”(编号:2016ZX05027) 中海石油(中国)有限公司科技项目“东海海域典型气田储量动用关键问题研究”(编号:YXKY-2017-ZY-13)联合资助
【分类号】：TE37

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