聚驱单管集油井热洗周期的优化

聚驱单管集油井的结蜡规律区别于聚驱双管流程和水驱井。聚驱见效后,单管集油井回压升高,抽油机井产液量下降,再用水驱热洗周期确定办法来确定聚驱单管集油井已不合适。经过对聚驱单管集油井回压升高与产液量、电流、上下载荷的关系进分析,得到聚驱单管集油井热洗周期调整标准:产液量下降到12%;上载荷上升到6%;下载荷下降到4.5%;热洗的电流指标为电流变化幅度1.12+ΔI/I倍。

水壶式集油井

在变电站中布置有许多带油电器设备,尤其是变压器贮油更多。为了防止油电器设备万一发生事故漏油污染环境,一般变电站均设置集油井,将漏油集中起来,然后进行处理。笔者参加过几个水电站升压变电站的设计,集油井采用顶部集油和排水,如图1所示。由于变电站一般为户外式。因此集油井同时成为集水井。

自力式定量掺水工艺技术研究与应用

掺水输送是国内外广泛用于高凝、高黏原油采出井的一种集油工艺,这一工艺的关键环节是掺水量的调控。目前,掺水量普遍采用截止阀人工节流调控和调节阀自动调控两种方式,前者属于粗放调节,难以使并联掺水管系的各支路流量达到给定值,总掺水量总是高于给定量,且各支路流量波动干扰严重;后者可以做到流量精准调控,但投资和维护费用高。本文介绍了一种自力式定量掺水工艺技术的研究与应用成果,可有效克服上述两种方法的不足,具有掺水定量精准,投资和维护费用低,基本无人工操作的优点,在大庆油田和吉林油田获得推广应用。

Pressure Buildup Analysis Using Type Curves for a Well in a Pressure-Maintained System

The development and application of a new solution is demonstrated for the type-curve analysis and in-terpretation of well test data from a multiwell reservoir system of both production and injection wells with two-phase flow. The buildup type curves or buildup behavior could be obtained through the solution by using su-perposition. But a new outer boundary condition for variable pressure boundary must be introduced to obtain the correct pressure buildup solutions by superposition. A technique is shown to determine the deviation time from the infinite-acting semilog radial flow stabilization in the derivatives of pressure, which is calculated with respect to and plotted vs. shut-in time. Field examples are given to illustrate the use of the proposed method for analyzing transient pressure data from a well located in a multi-well water-injection reservoir. An adaptive genetic algorithm-based method is used to match the pressure and pressure derivative data to estimate reservoir parameters. The validity and applicability of the proposed method are also demonstrated through the examples.