SS井抢险压井机理分析

简要介绍了ＳＳ井的抢险压井过程。论述了“内堵强压”方案的改进和实施情况。同时根据压井综合曲线图和计算结果，着重分析了压井时套压和泵压变化的四个过程。

水平井工程师法压井技术探索

随着水平井应用范围日益扩大,水平井钻井井喷及井下事故的风险也随之增加。为有效避免井喷事故的发生,以工程师压井原理为基础,在水平井剖面上找出对应的井口、造斜点、稳斜点和钻头处四个关键点,并分别计算出这四个点的总循环立管压力,再将相邻两点以直线相连,计算出各段直线段的定冲压降值,制作成水平井压井数据控制表。从此表可看出当压井液到达稳斜点时,循环立管压力降至最小值;水平井段越长,其值越低。所以在整个压井期间,只要在不同井段控制不同的压降值作为循环立管压力控制的依据,就可实现水平井全井段井底常压法压井的目的,从而杜绝井喷、卡钻及井漏等事故的发生。

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.

复杂井需要新的井控方法

随着人们对井筒内动态环境的进一步认识和了解 ,人们对复杂井的井控处理方式也有了根本的变化。本文对新的井控方法和常规的井控方法进行了对比 ,从几个方面可以看出新的井控方法具有常规方法不可替代的优越性。特别是在复杂井的钻井作业或者修井作业中 ,使用新的井控方法将会更安全、更可靠。