基于生产测井的多层试井解释技术

发布时间：2018-05-30 00:18

本文选题：致密砂岩气井 + 分压合采　；参考：《天然气工业》2017年10期

【摘要】：致密砂岩气井为了获得工业产气量,常常采取多层分压合采措施,常规试井解释由于采用平均化的单层试井解释模型,容易造成解释结果无法反映各个产层的真实信息。为此,基于鄂尔多斯盆地致密砂岩气田某井4个产层分层压裂后开展的268 h的压降测试、468 h的压力恢复测试和生产测井数据,采用单层试井解释模型和多层试井解释模型分别对其进行解释,其中多层试井解释模型结合生产测井解释成果引入分层产量数据作为新增约束条件,对多层合采气井进行精细试井解释。结果表明:(1)3种单层试井解释模型均等同于将该井4个层位的参数平均化,各项指标均拟合较好,反映了单层试井解释模型具有多解性;(2)多层试井解释录入各层储层物性参数,并引入分层产量作为拟合约束条件,其压力及压力导数双对数曲线拟合、单对数曲线拟合、压力史拟合和分层产量拟合均较好,能够获得各层的表皮系数、裂缝半长、渗透率及边界等数据。结论认为,采用多层试井解释模型降低了合采气井试井解释结果的多解性,定量评价了各储层的参数,为类似储层的针对性措施和动态描述提供了参考。
[Abstract]:In order to obtain the industrial gas production of tight sandstone gas wells, multi-layer pressure-combined production measures are often adopted. Because the average single-layer well test interpretation model is adopted in the conventional well test interpretation, the interpretation results can not reflect the true information of each production zone. Therefore, based on the pressure recovery test and production logging data of 468 h of 268 h pressure drop test carried out after stratified fracturing of 4 production zones in a tight sandstone gas field in Ordos Basin, the pressure recovery test and production logging data are obtained. The single-layer well test interpretation model and the multi-layer well test interpretation model are used to interpret them, in which the multi-layer well test interpretation model combined with the production log interpretation results introduces the stratified production data as the additional constraint condition. Fine well test interpretation of multi-layer gas production wells is carried out. The results show that the three kinds of single-layer well test interpretation models are equal to the average parameters of the four layers of the well, and all of the indexes are fitted well, which reflects that the single-layer well test interpretation model has the property of multi-resolution and has been inputted into the physical parameters of the reservoirs in the multi-layer well test interpretation. The stratified yield is introduced as the fitting constraint condition. The pressure and pressure derivative double logarithmic curve fitting, the single logarithmic curve fitting, the pressure history fitting and the stratified yield fitting are all better, and the skin coefficient and fracture half length of each layer can be obtained. Permeability and boundary data. The conclusion is that the multi-layer well test interpretation model can reduce the multi-solution of the well test result of the combined production well, and quantitatively evaluate the parameters of each reservoir, which provides a reference for the targeted measures and dynamic description of the similar reservoirs.
【作者单位】：中国石油长庆油田公司苏里格南作业分公司;西南石油大学;中国石油长庆油田公司苏里格气田研究中心;
【分类号】：TE353

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