Horizontal well sand and water production profile prediction method and sand prevention and water control sieve tube optimization design method

Abstract

The invention relates to the technical field of sieve tube sand prevention well completion during oil and gas exploitation, in particular to a horizontal well sand and water production profile prediction method and a sand prevention and water control sieve tube optimization design method. According to easily obtained resistivity logging information, spontaneous potential logging information, natural gamma-ray logging information and interval transit time logging information, the stratum sand and water production cooperative relation is considered comprehensively, the high-speed inflow and sandproduction locations and region length at heterogeneous production intervals are identified, and the major designed target locations for sand and water control are determined. The problem of blindness of general water prevention and water control of a horizontal well is solved. The economic benefits are increased. Moreover, the method is simple, easy to realize and reliable in result.

Description

Technical field [0001] The invention relates to the technical field of screen pipe sand control well completion in oil and gas exploitation, in particular to a horizontal well sand production and water profile prediction method and a sand control and water control screen optimization design method. Background technique [0002] With the development of petroleum exploration and development technology, the use of horizontal well technology to develop oil and gas fields has become an effective technical means to increase oil field recovery and single well production, extract remaining oil, and reduce the cost of oil per ton. Horizontal wells increase the contact area between the wellbore and the oil reservoir, and can better develop thin oil layers or reservoirs with large vertical permeability, and play an increasingly important role in the exploitation of oil and gas resources. [0003] Water production and sand production from horizontal wells in loose sandstone reservoirs are two ...

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Problems solved by technology

[0003] Water production and sand production of horizontal wells in unconsolidated sandstone reservoirs are two thorny issues. After water breakthrough in horizontal wells, the entire wellbore will be flooded in a short period of time, seriously reducing the production efficiency of horizontal wells.

At the same time, the ground stress in the high-speed water outlet area of ​​the horizontal well is weak, and the fine sand and gravel in the formation are easy to peel off under the action of fluid erosion and shearing, and are carried by the formation fluid into the wellbore of the production layer of the horizontal well, causing wellbore blockage and equipment damage

[0004] The current problems in the field of sand control and water control of horizontal wells include: (1) The water and sand production profiles of horizontal wells with long production intervals are heterogeneous, and it is difficult to obtain a large amount of water and sand production positions accurately. Targeted sand control and water control construction in severe layers can only use general techniques for the entire layer, and it is difficult to achieve ideal comprehensive sand control and water control effects; The water and sand production problems of horizontal wells in long intervals and the research on water control and sand control technologies are basically in a divide-and-conquer situation, and sand and water control lacks purpose, and general control measures for the entire interval increase seepage resistance, energy consumption, and operating production costs

Existing problems include: (1) Lack of specially designed integrated sand control and water control screens; (2) Insufficient flexibility and replaceability of internal parts of screens; (3) Most of the earlier sand control and water control integrated screens The water control part of the chemical screen adopts ICD water control technology, which is not self-adaptive; (4) Water control parameters are separated from sand control optimization, and there is a lack of comprehensive optimization design for sand control and water control parameters

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