Sequencing Hydraulic Fractures to Optimize Production for Stacked Well Development in the Delaware Basin

Damani, Akash; Kanneganti, Kousic; Malpani, Raj

doi:10.15530/urtec-2020-3272

Cited by 3 publications

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Optimization of the Target Layer for Three-Dimensional Shale Gas Development in Weiyuan Block

Lin,

Zhou,

Wang

et al. 2024

E3S Web Conf.

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In order to explore whether the Weiyuan block can effectively carry out three-dimensional development well network deployment, we should first explore whether there is a target layer to meet the three-dimensional development. Based on three-dimensional geological, fracture and rock mechanics models, this paper finds that the absolute stress difference between Longyi14a minor layer and Longyi14b minor layer in the study area is less than 5 MPa, and there is no obvious stress isolation section, and the longitudinal distance of the upper part of Longyi14a minor layer from the top of Longyi11 layer distributes in the range of 18~28 m, which is able to effectively avoid strong inter-well interference with the horizontal wells of Longyi11 layer. So, according to the distribution characteristics of the remaining reserves and reservoir characteristics of Weiyuan block, Longyi14a minor layer is initially preferred as the target for three-dimensional development. In order to further explore the specific layers, based on the original three wells of H3 platform, four threedimensional development schemes with different target layers were designed, deploying L4 and L5 wells in the Longyi13 layer~Longyi14c minor layer, and the Longyi14a minor layer was confirmed as a three-dimensional development target layer system based on numerical simulation results. Finally, in the lower half branch of H3 platform, an “M” type three-dimensional well network pattern with five wells was adopted (three 4a wells of the lower layer Longyi11 layer L1, L2 and L3, and two wells of the upper Longyi14a minor layer - L4 and L5). The three-dimensional well network can increase production for the platform by 1.76×108 m3 and recovery increased from 14.3% to 29.3%, an overall increase of 15%. The relevant understanding can provide a reference for the three-dimensional development strategy of Weiyuan shale gas block.

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Optimization of the Target Layer for Three-Dimensional Shale Gas Development in Weiyuan Block

Lin,

Zhou,

Wang

et al. 2024

E3S Web Conf.

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Reducing the Volume of Water Needed for Hydraulic Fracturing by Employing Natural Gas Foamed Stimulation Fluid

Malpani

Daeffler

Verma

et al. 2020

SPE Annual Technical Conference and Exhibition

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As part of a Department of Energy (DOE)-sponsored program, an optimal thermodynamic pathway to transform natural gas (NG) into pressurized NG suitable for use as the internal phase in a foamed fracturing fluid has been already developed. Using NG foamed fracturing fluids reduces the enormous water requirements for stimulation by as much as 60% to 80% and poses benefits for productivity in water-sensitive formations. This study aims to extend the investigation to characterize the hydraulic fracture geometry and quantify the expected production when using an NG foam fracturing fluid. Using validated models, we provide a comparative analysis to determine the advantages of using natural gas foams relative to conventionally used slickwater, linear gel, and crosslinked fluid. A full 3D reservoir model in a Duvernay Shale formation was constructed. Fundamental laboratory and pilot field tests data was collected for the NG foam fluid properties for numerical modeling. Rheology, friction, and leakoff properties of the fracturing fluids were incorporated in creating a numerical model. A 3D-complex hydraulic fracture simulation model incorporating 1D and 2D particle transport models were used. A numerical reservoir simulation for different sensitivity scenarios was incorporated for fracture modeling and gas production evaluation. Owing to lower density than conventional liquid column, the NG-foamed fluids are likely to result in higher surface pressure. A reduced pump rate with NG foamed fracturing fluid leads to a lower frictional pressure loss in tubing, without compromising the ability to place the desired amount of proppant in the formation. The non-Newtonian shear-thinning NG-foamed fracturing fluid exhibits a higher, effective viscosity that enables effective transport of the proppant. Modeling results indicate that the overall fracture geometry and proppant placement is much better for NG-foamed fluids than high-volume slickwater needed to pump the same amount of proppant for well spacing and a field development plan. The simulated production performance for medium-viscosity fluids such as NG-foamed fluid, linear gel, and high-viscosity slickwater, is better than that of low-viscosity slickwater or high-viscosity crosslinked gel fluids. A low-viscosity fluid results in proppant settling and dunning, resulting in lower conductive height of fractures while the high viscosity treatment uses less fluid, so the surface area created is less and there is potential for height grow out of the target formation.

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A Study on the Remaining Reserves of the Weiyuan Shale Gas Block in Three-Dimensional Development

Lin,

He,

Wang

et al. 2024

Applied Sciences

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After 5 different plans of development, the Weiyuan block is struggling to maintain stable production and urgently needs a new method to improve the recovery rate. Practice at home and abroad shows that three-dimensional development can effectively improve the degree of vertical shale gas utilization. Therefore, this paper first analyzes the distribution of reservoirs in the Weiyuan block and calculates the distribution of remaining reserves through the methods of fine description of gas reservoirs and establishment of a three-dimensional geological model. The results show that the recovery degree of the platform in the main production area of Weiyuan is 35~60%, and the average remaining reserves of the wells are (1.2~3) × 108 m3, and there is three-dimensional development potential in the local area. Secondly, through the establishment of a fracture and rock mechanics model, the target layer system for three-dimensional development of the Weiyuan block is preliminary selected from five aspects, namely, remaining reserves, reservoir characteristics, fracture density, mechanical characteristics, and the comparison of the height of the fracture network. Finally, in order to check the correctness of the target layer for three-dimensional development and evaluate the effect of the three-dimensional development, four scenarios for the lower branch of the H8 platform are designed and numerically simulated using Petrel RE software. The results of the numerical simulation show that Option 2 is the most effective, which can increase the production of the platform by 1.76 × 108 m3, and the recovery rate grows from 16.4% to 31.0%, with an overall increase of 14.6%. The relevant understanding can provide a reference for the three-dimensional development strategy of the Weiyuan shale gas block.

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Sequencing Hydraulic Fractures to Optimize Production for Stacked Well Development in the Delaware Basin

Cited by 3 publications

References 0 publications

Optimization of the Target Layer for Three-Dimensional Shale Gas Development in Weiyuan Block

Optimization of the Target Layer for Three-Dimensional Shale Gas Development in Weiyuan Block

Reducing the Volume of Water Needed for Hydraulic Fracturing by Employing Natural Gas Foamed Stimulation Fluid

A Study on the Remaining Reserves of the Weiyuan Shale Gas Block in Three-Dimensional Development

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