Oil well sand prevention method for heavy oil reservoir

Abstract

The invention discloses an oil well sand prevention method for a heavy oil reservoir, which is applied to heavy oil exploitation in oil fields. The method comprises the following steps of: preparing, namely pulling a production pipe column out, inserting a sand removal pipe column, exploring a sand surface, removing sand, throwing a ball for pressure tests, and pulling the sand removal pipe column out; pigging, cleaning a pipe, washing a well, and pulling a pigging pipe column out; performing sand prevention construction, namely inserting a sand prevention pipe column for magnetic positioning depth calibration; making the pressure tests qualified; performing seat sealing, and opening a filling channel; filling direct circulation sand carrying liquid and quartz sand; washing hands, lifting the sand prevention pipe column upwards and pulling a hand washing pipe column; and inserting an oil exploitation production pipe column into the whole well. The invention has the advantages that: the method is applied to oil well sand prevention and has the one-time success rate of 100 percent, and a single well can be used for continuous production for more than 600 days.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to a sand control method for oil wells in heavy oil reservoirs. Background technique [0002] With the deepening of oilfield rolling and edge expansion, some ordinary heavy oil reservoirs appeared. The burial depth of this kind of oil reservoirs is relatively shallow, and some oil wells have serious sand production. Conventional sand control methods cannot solve the problem, resulting in the abnormality of this part of ordinary heavy oil. mining. [0003] Loose cemented sandstone particles enter the wellbore or carry to the surface with oil and water, which will erode, wear, block deep well pumps and pipelines and ground equipment, or deposit at the bottom of the well, block the oil layer, reduce or stop production of the oil well; even the oil layer collapses, Collapse the casing, leading to overhaul or scrapping of the oil well. During oil production, based on...

AI Technical Summary

Problems solved by technology

The advantage of chemical sand control is that it can be used for sand control in multiple oil layers in the same well without shrinking the wellbore; the disadvantage is that the cost is high and the production capacity of the sand production layer is easily reduced.