Multi-round steam injection well high-strength filling sand control technology method

Abstract

The invention discloses a multi-round steam injection well high-strength filling sand control technology method. The method comprises the following steps: 1, pulling out a borehole production pipe string, and then lowering in a sand flushing pipe string to perform sand flushing operation; 2, pulling out the borehole sand flushing pipe string, and then lowering in a drifting pipe string to carry out the drifting operation; 3, pulling out the borehole drifting pipe string, and then lowering in a sand control pipe string; 4, carrying out the filling operation; 5, carrying out the steam injectionoperation; and 6, lowering in a drill plug pipe string and removing a drillable sand filter pipe of the sand control pipe string. The method integrates a near borehole zone, a screen sleeve annulus and a sand filter pipe, solves the problem of reciprocating movement of gravel during multiple rounds of steam injection, and effectively improves the stability of a sand retaining barrier. After filling sand control, the sand control pipe string is easy to clear, and sufficient wellbore space for is provided for the later production of oil wells, especially a variable casing damaged well.

Description

technical field [0001] The invention relates to the technical field of downhole construction in oil fields, in particular to a high-strength filling and sand control method for multi-round steam injection wells. Background technique [0002] The proven geological reserves of heavy oil in Shengli Oilfield are 660 million tons, and the produced geological reserves are 529 million tons. The production is mainly based on multiple rounds of steam injection, and the average annual sand control operations are about 1,000 wells. The extrusion filling sand control technology is mainly used. Liquid is 20.31m3 / d, and daily oil is 3.67t / d, which is the main position for sustained and stable production in the middle and late stages of oilfield development. During multiple rounds of steam injection production, sand and gravel move back and forth, resulting in loosening and damage to the sand retaining barrier. The effective period of sand control is short. When the sand production is seri...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-round steam injection well high-strength packing sand control method, which integrates the near-wellbore zone, the screen sleeve annulus and the sand filter pipe, and solves the problem of gravel reciprocating movement during the multi-round steam injection process , effectively improve the stability of the sand retaining barrier

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