Sand control and steam injection integrated device and method

Abstract

The invention relates to an oil and gas steam injection exploitation device for an oilfield, and particularly relates to a sand control and steam injection integrated device. The invention further relates to a method which uses the sand control and steam injection integrated device to realize sand control and steam injection. The sand control and steam injection integrated device provided by the invention comprises a first heat preservation tubing, a heat preservation downhole compensator, a second heat preservation tubing, a steam injection check valve, a sealing device, a cannula sealing device and at least one sand control and steam injection unit, wherein the first heat preservation tubing, the heat preservation downhole compensator, the second heat preservation tubing, the steam injection check valve, the sealing device, the cannula sealing device and at least one sand control and steam injection unit are connected in turn. Through integrated design of a sand control device and a steam injection device, a set of tubular columns can realize sand control and steam injection at the same time. A process program is simplified. Complex situations are avoided. The effects of sand control and steam injection are effectively improved.

Description

technical field [0001] The invention relates to an oil and gas steam injection exploitation device for an oil field, in particular to an integrated sand control and steam injection device. The present invention also relates to a method for realizing sand control and steam injection using the sand control and steam injection integrated device Background technique [0002] At present, in the process of steam injection thermal recovery of heavy oil reservoirs in Shengli Oilfield, the general steam injection production method accounts for more than 96%. Due to the influence of interlayer heterogeneity in multi-thin layer heavy oil reservoirs, vertical steam absorption profiles are generally exposed. The problem of unevenness, the vapor absorption thickness of the oil layer only accounts for 30%-50% of the total thickness, and the contradiction between the reservoirs is prominent, which seriously affects the production degree of the reservoir. [0003] In the current development...

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Problems solved by technology

[0004] Therefore, in the existing sand control and steam injection process, the sand control and steam injection process is complicated, and the structure of the double pipe string is easy to cause the gap between each layer. The problem of unbalanced distribution of steam dryness between oil layers, the steam enthalpy ratio distributed to each oil layer is inconsistent with the steam flow ratio, resulting in the steam enthalpy not being effectively distributed and utilized. In addition, the heat loss during the steam injection process is serious. It is easy to damage the casing, etc. These problems have become problems that need to be solved urgently in the process of sand control and steam distribution.

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