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CN-122014168-A - ICD water control screen pipe structure of crack type reef limestone oil reservoir

CN122014168ACN 122014168 ACN122014168 ACN 122014168ACN-122014168-A

Abstract

The invention discloses an ICD water control screen pipe structure of a crack type reef limestone oil reservoir, which comprises a well wall and an ICD water control screen pipe column, wherein the well wall comprises a horizontal production section, the ICD water control screen pipe column is positioned in the well wall and comprises filter sections and blind pipe sections which are alternately connected in the horizontal production section, and the length ratio of the filter sections to the blind pipe sections which are alternately connected in the horizontal production section is 1:1. The ICD water control screen pipe column is arranged in the screen ratio of 1:1 in the well wall horizontal production section so as to adapt to special geological conditions of the crack type reef limestone oil reservoir, effectively balance inflow distribution of fluid in the crack type reef limestone oil reservoir, inhibit excessive liquid production of a hypertonic crack section, reduce the risk of bottom water coning, and remarkably improve the water control effect and the well completion effect.

Inventors

  • LIU CHENGLIN
  • Jiang Renkai

Assignees

  • 中海石油(中国)有限公司深圳分公司
  • 中海石油深海开发有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (10)

  1. 1. The ICD water control screen pipe structure of the fractured reef limestone oil reservoir is characterized by comprising a well wall (1) and an ICD water control screen pipe string (2); The well wall (1) comprises a horizontal production section (11), the ICD water control screen pipe column (2) is located in the well wall (1), the ICD water control screen pipe column (2) comprises filtering sections (21) and blind pipe sections (22) which are alternately connected in the horizontal production section (11), and the length ratio of the filtering sections (21) to the blind pipe sections (22) which are alternately connected in the horizontal production section (11) is 1:1.
  2. 2. The ICD water screen structure of a fractured reef limestone oil reservoir according to claim 1, wherein the well wall (1) further comprises a non-production section (12), the horizontal production section (11) being in communication with the non-production section (12); the ICD water control screen pipe structure of the fracture type reef limestone oil reservoir further comprises a sleeve (3), and the sleeve (3) is fixed on the non-production section (12); The ICD water control screen pipe string (2) further comprises a heel end blind pipe section (22 a) which is arranged in the sleeve (3) and located at the heel end (13) and at least one ICD water control screen pipe which is arranged in the sleeve (3), wherein the heel end (13) is one end, close to the non-production section (12), of the horizontal production section (11).
  3. 3. The ICD water screen structure of a fractured reef limestone oil reservoir according to claim 2, wherein the length of the heel end blind pipe section (22 a) is 1m to 5m.
  4. 4. The ICD water screen structure of a fractured reef limestone oil reservoir according to claim 2, wherein an annular space is formed between the ICD water screen string (2) and the inner wall of the casing (3) and the well wall (1), respectively, and the annular space is used for filling continuous packer particles (4), and the continuous packer particles (4) are resin particles.
  5. 5. The ICD water screen structure of a fractured reef limestone oil reservoir according to claim 4, wherein the resin particles are made of one or more of polyethylene, polypropylene, polyvinyl chloride and styrene-divinylbenzene crosslinked copolymer.
  6. 6. The ICD water screen structure of a fractured reef limestone oil reservoir according to claim 4, wherein the particle size of the continuous packer particles (4) is 0.10-1.8mm and the true density is 0.9-1.2 g/cc.
  7. 7. The ICD water screen structure of a fractured reef limestone oil reservoir according to claim 4, wherein the annular space is for filling with a filling liquid carrying the continuous packer particles (4).
  8. 8. The ICD water control screen structure of the fractured reef limestone oil reservoir according to claim 2, further comprising a packer (5), wherein the packer (5) is arranged around the ICD water control screen connected with the heel end blind pipe section (22 a) in the sleeve (3).
  9. 9. The ICD water control screen structure of a fractured reef limestone oil reservoir according to claim 2, wherein the filter segment (21) comprises a screen oil pipe (211), an ICD flow control device (212), a diversion layer (213) and a protection layer (214); ICD accuse flow device (212) on screen pipe (211) along its axial interval setting, and with screen pipe (211) inside intercommunication, guide layer (213) cover is established screen pipe (211) outside, protective layer (214) cover is established guide layer (213) outside, guide layer (213) are used for filtering guide fluid.
  10. 10. The ICD water screen structure of a fractured reef limestone oil reservoir according to claim 9, wherein the filtering accuracy of the diversion layer (213) is selected according to the geological type of the fractured reef limestone oil reservoir and the particle size range of the filled continuous packer particles (4).

Description

ICD water control screen pipe structure of crack type reef limestone oil reservoir Technical Field The invention relates to the technical field of oil exploitation well completion, in particular to an ICD water control screen pipe structure of a fractured reef limestone oil reservoir. Background In the petroleum exploitation process, the rationality of the ICD water control screen pipe structure has a direct influence on the productivity and the exploitation life of the oil well. ICD (InflowControlDevice ) water control screen pipe and continuous packer particle packing completion technology is used as a mature completion mode and is widely applied to various oil reservoirs. However, fractured reef limestone reservoirs have special geological conditions, such as strong heterogeneity ("matrix-fracture" dual medium system shows extreme discontinuity and disorder in spatial distribution, physical parameters and fluid flow behavior), uneven fracture distribution (hypertonic section with fracture development and hypotonic section with less fracture), high risk of bottom water coning, and the like, and the conventional ICD water control screen pipe structure in such reservoirs easily causes uneven fluid inflow distribution on the pipe column, thereby causing problems of bottom water coning and high-permeability section channeling. In addition, ICD accuse water sieve pipe tubular column can hinder continuous packing body granule in following the abundant filling of end department crooked annular space in traditional ICD accuse water sieve pipe structure, leads to filling compactness not enough, can't effectively pack the production section, easily causes different interlaminar cross flow, seriously influences oil well exploitation efficiency and life-span. Disclosure of Invention The invention aims at least one defect of the related technology in the background technology, namely that the traditional ICD water control screen pipe structure is easy to cause uneven inflow and distribution of fluid on a pipe column in a crack type reef limestone oil reservoir, and provides the ICD water control screen pipe structure of the crack type reef limestone oil reservoir. The technical scheme adopted for solving the technical problems is that an ICD water control screen pipe structure of a crack type reef limestone oil reservoir is constructed, and the ICD water control screen pipe structure of the crack type reef limestone oil reservoir comprises a well wall and an ICD water control screen pipe column; The well wall comprises a horizontal production section, the ICD water control screen pipe string is positioned in the well wall and comprises a filtering section and a blind pipe section which are alternately connected in the horizontal production section, and the length ratio of the filtering section to the blind pipe section which are alternately connected in the horizontal production section is 1:1. In some embodiments, the well wall further comprises a non-productive section, the horizontal productive section being in communication with the non-productive section; The ICD water control screen pipe structure of the crack type reef limestone oil reservoir further comprises a sleeve, and the sleeve is fixed on the non-production section; the ICD water control screen pipe string further comprises a heel end blind pipe section arranged in the sleeve and positioned at the heel end and at least one ICD water control screen pipe arranged in the sleeve, wherein the heel end is one end, close to the non-production section, of the horizontal production section. In some embodiments, the heel end blind leg has a length of 1m-5m. In some embodiments, the ICD water control screen pipe string forms an annular space with the inner wall of the casing and the well wall, respectively, the annular space being for filling with continuous packer particles, the continuous packer particles being resin particles. In some embodiments, the material of the resin particles includes one or more of polyethylene, polypropylene, polyvinyl chloride, and styrene-divinylbenzene crosslinked copolymer. In some embodiments, the continuous packer particles have a particle size of 0.10 to 1.8mm and a true density of 0.9 to 1.2 grams per cubic centimeter. In some embodiments, the annular space is for filling with a filling fluid carrying the continuous packer particles. In some embodiments, the ICD water control screen pipe structure of the fracture type reef limestone oil reservoir further comprises a packer, and the packer is arranged around the ICD water control screen pipe connected with the heel end blind pipe section in the casing. In some embodiments, the filter segment comprises a screen tubing, an ICD flow control device, a flow guiding layer, and a protective layer; The ICD flow control device is arranged on the screen pipe at intervals along the axial direction of the screen pipe and is communicated with the inside of the screen pipe, the guide layer is