The continuous pack-off technology: A novel water-control method and application to offshore horizontal wells of limestone reservoir

Feng, Li; Zhang, Wei; Li, Xiaodong; Pei, Bailin

doi:10.1016/j.petrol.2022.110137

Cited by 4 publications

(2 citation statements)

References 43 publications

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“…3 Therefore, how to reduce the water production of extracted wells through sealing and profile control operations has become a current research hotspot. 4 Water plugging and profile control technology has been proven to be an effective means of improving the internal geological structure of oil reservoirs and enhancing oil recovery in low-permeability reservoirs, which has received the attention of a large number of researchers. 3,5,6 The in-deep profile control technology and sealing profile control technology have great significance for achieving remote well profile control, adjusting formation structure, and improving formation heterogeneity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, investigation of temperature and salt resistant polyacrylamide microspheres used for deep sealing and profile control and function strengthening mechanism

Jinhua,

Siman,

Junwei

et al. 2024

J of Applied Polymer Sci

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Based on the requirements of deep sealing and profile control for the excellent temperature and salt resistance on polyacrylamide microspheres, the Poly‐AM/AMPS was prepared depends on aqueous solution polymerization method to improving oil and gas recovery efficiency in low‐permeability and heterogeneous reservoirs resulted by water channeling. The key technical parameters were established through single‐factor experimental methods, and the chemical structure was studied by infrared spectrum analysis (FTIR), energy spectrum analysis, and x‐ray diffraction analysis, and then the thermal stability was investigated depends on the thermogravimetric (TG) and differential thermogravimetric (DTG) distribution curves, moreover, the particle size and distribution, microstructure, and surface morphology were further studied. As a result, the results confirmed that the molecular structure of Poly‐AM/AMPS meets the expected design, and the quality retention rate at 800°C is 17.4%, the median particle size of Poly‐AM/AMPS particles is 35.88 μm, and the particle size distribution range is about 1.94–497.8 μm. Further, the Poly‐AM/AMPS was modified by maleic anhydride, sodium styrenesulfonate, and dimethyl diallyl ammonium chloride through conventional functional strengthening and modification, modified by nano‐SiO2, GO, and S‐CaCO3 through nano‐functional strengthening and modification. Additionally, the functional strengthening and modification mechanism was studied depends on the FTIR, TG, and DTG methods.

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Section: Introductionmentioning

confidence: 99%

Synthesis, investigation of temperature and salt resistant polyacrylamide microspheres used for deep sealing and profile control and function strengthening mechanism

Jinhua,

Siman,

Junwei

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…In the application of intelligent completion technology, formation water can easily flow around the packer through cracks/caves, leading to the sealing failure of the packer. Muradov and colleagues [9][10][11] proposed an optimization algorithm for the installation position of the packer in the horizontal well water control process by evaluating the impact of circulation isolation disturbance on the flow state of the completion reservoir. The number and location of the packer also depend on engineering technology and well conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental and thermal‐structure coupling analysis for oil and water‐swellable packer

Huang

Liu

2023

Energy Science & Engineering

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It has been widely acknowledged that traditional packers will lose their elastic performance in the context of long periods of operation due to plastic deformation. This paper will introduce a swellable packer that can reduce the failure cases of production effectively. The deformation of the packer rubber in different media and temperatures has been analyzed. The pressure test of several packer rubber under different media is carried out in this paper. The reasonable expansion clearance between the rubber tube and the well wall is obtained by strength calculation to ensure the sealing reliability of the packer. Finally, the thermomechanical coupling calculation of the packer with different structural sizes is carried out. Experiments at different temperatures show that the higher saline concentration is associated with a lower expansion rate and a larger expansion rate in clear water. At the same time, the expansion of volume in clear water increases. In addition, the higher the external temperature is, the larger the temperature gradient is. When the temperature of the outer ring is between 100°C and 140°C, the internal temperature rises to 37°C under the thermomechanical coupling effect.

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A geometric analysis-based approach toward mechanical analytics of multi-packer completion tubular string

Deng,

Zeng,

et al. 2024

J Petrol Explor Prod Technol

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Multi-packer completion strings have played a pivotal role in secure exploitation of oil and gas, increasing production and mitigating greenhouse gas emissions. While the integration of multi-packer structures has proven advantageous in oil and gas exploration, it has introduced complexities in load distribution, consequently giving rise to safety concerns. This study undertakes a thorough examination of the mechanical analysis pertaining to multi-packer completion strings. We present an analytical model for predicting the axial forces acting on the multi-packer string, utilizing the geometric constraint arising from the immobility of packers. It is demonstrated that the pressure differentials at the packers exhibit uniqueness in relation to both initial and boundary conditions, as well as the geometrical constraint. This paper provides an analytical solution for these pressure differentials. Novel concepts regarding the eigen-matrix of an N-packer completion string, influenced solely by Poisson’s ratio, a virtual $$(N+1)$$ ( N + 1 ) th packer and the eigen-depth and eigen-ratio of two adjacent packers, are proposed and their applications are discussed. Furthermore, this paper delves into a deeper examination of the multi-packer string’s underlying mechanism. A consistent algorithm grounded in geometric analysis is developed based on the analytical model. Validation of our model is performed using three practical cases across various operation conditions, and the results demonstrate the efficacy of this methodology in accurately predicting failure occurrences. Sensitivity analysis results further substantiate the robustness of this method in practical applications. Additionally, it has been shown that strategically positioning the packers in areas where the string is highly prone to fractures significantly enhances the safety of the multi-packer string system. The findings presented in this paper offer a foundational framework for analyzing the mechanical behavior of constrained strings. Furthermore, there is potential for the development of the analytical model to incorporate additional factors, such as string system with packers of semi-free or free movement. The proposed method is also of fundamental significance for safety evaluation of string systems in carbon storage projects, which is obtaining increasing attention in the context of carbon neutralization.

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The continuous pack-off technology: A novel water-control method and application to offshore horizontal wells of limestone reservoir

Cited by 4 publications

References 43 publications

Synthesis, investigation of temperature and salt resistant polyacrylamide microspheres used for deep sealing and profile control and function strengthening mechanism

Synthesis, investigation of temperature and salt resistant polyacrylamide microspheres used for deep sealing and profile control and function strengthening mechanism

Experimental and thermal‐structure coupling analysis for oil and water‐swellable packer

A geometric analysis-based approach toward mechanical analytics of multi-packer completion tubular string

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