Deep Tight Gas Zonal Isolation Solution with Novel Flexible and Expandable Cement Technology

Al-Thuwaini, Jamal; Abdulaziz, Mohammed Emad; Belousov, Yuri; Ekpe, Joseph; Taoutaou, Salim; Jaffery, Maimoon Fayyaz; Ahmad, Bilal; Elatrache, Bassam

doi:10.2118/131577-ms

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…The primary function of cement sheath in oil and gas wells is to achieve interlayer isolation, prevent interlayer channeling, and ensure the safety of oil and gas production. , However, cement is a brittle material that is susceptible to damage from various harsh external environments encountered during its long-term service life, − including oil and gas well stimulation and injection, tectonic movement, fault slip, and formation fluid corrosion. − As a result, the cement sheath may develop microcracks, which can compromise the integrity of the cement sheath and lead to annulus crossflow. Annulus channeling flow is a significant issue that includes oil, gas, water, and other substances, with annulus water channeling being particularly harmful. , The entry of high-pressure formation water into the reservoir can increase water cuts in the exploitation well and even lead to reservoir flooding.…”

Section: Introductionmentioning

confidence: 99%

“…1 , 2 However, cement is a brittle material that is susceptible to damage from various harsh external environments encountered during its long-term service life, 3 − 5 including oil and gas well stimulation and injection, tectonic movement, fault slip, and formation fluid corrosion. 6 − 15 As a result, the cement sheath may develop microcracks, which can compromise the integrity of the cement sheath and lead to annulus crossflow. Annulus channeling flow is a significant issue that includes oil, gas, water, and other substances, with annulus water channeling being particularly harmful.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characteristics of a pH Intelligent Response Blocking Agent for the Microcrack in the Cement Sheath

Bi,

Guo,

Chen

et al. 2023

ACS Omega

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Microcracks in the annular cement sheath of oil wells frequently cause annular water channeling. Traditional cement squeeze technology has a low success rate in controlling this issue. Based on the conventional profile control water-blocking agent for underground in situ gelling and polyacrylic acid, a pH intelligent response microcrack-blocking agent was developed to block the microcrack in the cement sheath. The study investigated the influence of pH on the viscosity characteristics of the new blocking agent, the impact of polyacrylic acid on the compression recovery ability of the new blocking agent after gelling, the change in viscosity of the blocking fluid after flowing through the microcrack in the cement sheath, and the blocking effect after gelling. The results indicated that the new blocking agent has excellent viscosity-increasing ability with pH. After flowing through the microcrack in the cement sheath, the viscosity of the blocking agent increased significantly with the extension of the contact distance between the blocking agent and the microcrack in the cement sheath, which is very conducive to the retention of the blocking agent in the microcrack of the cement sheath. Polyacrylic acid had a negligible effect on the compression recovery ability of the blocking agent after gelling. At a fracture length of 5 cm, the pressurebearing capacity of the blocking agent could reach 6 MPa.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and Characteristics of a pH Intelligent Response Blocking Agent for the Microcrack in the Cement Sheath

Bi,

Guo,

Chen

et al. 2023

ACS Omega

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show abstract

“…This phenomenon appears frequently and has drawn great attention. Lots of mechanism researches have been done and practical measures have been taken [2,3,4,5]. Generally, the measures include the uses of expandable cement, swellable hanger and swellable packer.…”

Section: Introductionmentioning

confidence: 99%

Design of Self Swellable Casing Centralizer for Zonal Isolation in Petroleum Wells - A Utility Model of Well Completion Tool

Yin

Gao

Qin

et al. 2012

AMR

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In view of the problem that fluid channeling between zones resulting from poor quality of cement sheath, a new casing centralizer is designed. The centralizer can make casing string in position as usual and seals micro-channels by the oil/water swellable rubber. Swellable rubber slices are inlaid in centralizer edges to add sealing efficiency. In order to seal diversion trenches effectively, axial moveable rubber bars are designed. During slurry injection, rubber bars are pushed upwards by differential pressure to open the flowpathes; after displacement, rubber bars reset under spring force. So, a circular sealing strip is formed by rubber slices and rubber bars for zonal isolation. In the paper, structure and working principle of this tool are described, materials and components are matched, structure strength is calculated, and the feasibility of the new tool is discussed.

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Effect of Stratigraphic features on Deep-Water Cementing Operation – A Review

Okoro

Sanni

Emetere

et al. 2019

J. Phys.: Conf. Ser.

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Drilling operations in deep-water environment is faced with technical challenges despite its massive record of huge hydrocarbon reserves when compared with onshore oil and gas fields. The weak, unstable formations coupled with adverse deep-water conditions poses as a challenge to cementing operations. Narrow pressure window conditions are encountered when the wellbore pressure required to contain subsurface pressures lies close to the pressure at which losses may be sustained. This is evidence in the ratio of pore pressure to vertical stress moving close to lithostatic condition. This can either be caused by porous formation or by the way of inducted fractures in weak or sheared or unconsolidated zones in the subsurface. This study showed an overview of some possible challenges faced in deep-water cementing operations in relation with stratigraphic features of the deep-water environment. From the review it was gathered that the stratigraphic nature of deep-water environment has a huge effect on cementing operations for oil and gas wells. The study also highlighted some gaps in the literature which require urgent attention to reduce loss circulation. These gaps include but not limited to: spacers generating sufficient downhole force to overcome the yield stress of the mud and the need for a new type of treatment for lost returns. Managed pressure cementing operations may control wellbore pressures.

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Deep Tight Gas Zonal Isolation Solution with Novel Flexible and Expandable Cement Technology

Cited by 7 publications

References 4 publications

Preparation and Characteristics of a pH Intelligent Response Blocking Agent for the Microcrack in the Cement Sheath

Preparation and Characteristics of a pH Intelligent Response Blocking Agent for the Microcrack in the Cement Sheath

Design of Self Swellable Casing Centralizer for Zonal Isolation in Petroleum Wells - A Utility Model of Well Completion Tool

Effect of Stratigraphic features on Deep-Water Cementing Operation – A Review

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