天然气水合物开采井防砂充填层砾石尺寸设计方法

发布时间：2018-05-03 02:23

本文选题：天然气水合物 + 试采　；参考：《石油勘探与开发》2017年06期

【摘要】：针对水合物储集层流体抽取法开采过程中面临的出砂问题,提出了针对黏土质粉砂型水合物储集层的"防粗疏细"式防砂充填层砾石尺寸设计方法,并以中国南海神狐海域X站位为例进行了具体分析。以X站位为例,分析了水合物储集层地层砂基本特性,对地层砂粗、细组分进行划分,并分别计算了疏通细组分和阻挡粗组分所需的防砂充填层砾石尺寸范围,通过求解两者的交集来确定最佳砾石尺寸。研究表明,X站位水合物储集层为分选性、均匀性极差且黏土含量较高的粉砂质储集层,上、下部储集层防砂充填层最佳砾石尺寸设计结果分别为143~215μm和240~360μm。在现场施工无法严格满足分层防砂要求的情况下,为了兼顾上、下部储集层,在满足充填强度的前提下,推荐X站位防砂充填层砾石尺寸为215~360μm。
[Abstract]:Aiming at the problem of sand production in the process of extraction of hydrate reservoir fluid, this paper puts forward a design method of gravel size for clay silty sand type hydrate reservoir with "anti-rough and fine" sand control and filling layer. The X station in Shenhu sea area of South China Sea is taken as an example. Taking X station as an example, the basic characteristics of formation sand in hydrate reservoir are analyzed, the coarse and fine components of formation sand are divided, and the size range of gravel in sand control and filling layer for dredging fine component and blocking coarse component is calculated respectively. The optimum gravel size is determined by solving the intersection of the two. The results show that the gas hydrate reservoir at station X is a silty sand reservoir with very poor uniformity and high clay content. The optimum gravel size design results of sand control and filling layer in upper and lower reservoir are 143 ~ 215 渭 m and 240 ~ 360 渭 m, respectively. Under the condition that field construction can not strictly meet the requirements of stratified sand control, in order to give consideration to the lower reservoir, on the premise of satisfying the filling strength, it is recommended that the gravel size of X station sand control and filling bed is 215360渭 m.
【作者单位】：青岛海洋地质研究所国土资源部天然气水合物重点实验室;青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室;
【基金】：国家自然科学基金(41606078) 国家重点研发计划深海专项(2017YFC0307600) 青岛海洋科学与技术国家实验室开放基金(QNLM2016ORP0203,QNLM2016ORP0207)
【分类号】：TE358.1

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