Abstract Traditional water based fluids tend to penetrate into shale formations, and interact with clay minerals, which results in swelling wellbore instability. The larger content of some deep shales compared regular onshore generates more instability problems. To reduce shale-fluid interaction, we need invasion by sealing the pores micro-fractures shales. Therefore, objectives this study are conduct pore pressure transmission (PPT) tests test that contain two new families nanoparticles...

ABSTRACT Many coalbed methane reservoirs and Devonian shale are naturally fractured with part of the gas adsorbed in low permeability matrix. The adsorption mechanism is controlled by reservoir pressure; during depletion reservoirs, matrix released as free flowing from to fractures then w'ellbore. In addition, these frequent layered. This paper presents an approximate analytical model for modeling commingled (multilayer) sorption effects. Our work shows that this can be developed based on...

Routine measurement of hydraulic diffusivity ultralow permeability rocks, such as shale, is a prolonged process. This study explores the effects sorptive characteristic porous medium on diffusivities shale rocks. The examined rock types include Mancos Shale, Catoosa Eagle Ford and core samples from Gulf Mexico. First, adsorption isotherms selected rocks were obtained. Then, properties determined using Shale/Fluid Interaction Testing Cell, which employs pore pressure transmission technique....

Summary The main challenge for the Mukhaizna steamflood field is to allocate steam dynamically throughout entire field, which consists of more than 3,200 wells, obtain most attractive reservoir performance forecast. To address this challenge, Occidental has developed a state-of-the-art closed-loop optimization solution called Oxy Field Optimizer (OFO). aim study enhance accuracy, robustness, and predictability OFO. Recent advances include connection design, simulation stability,...

Abstract To optimize steamflood in Mukhaizna Field, Occidental developed connections-based simulation models that retains most of the steam flooding physics. These address issue lengthy run time traditional 3D reservoir and resolve predictability issues fast physics-less AI/ML models. As these are being used for full field optimization since 2020, ensuring reliability accuracy was a key consideration to optimally operate such large asset. gain more trust models, input/output, historical...

Abstract For a stress-sensitive reservoir, the constant rock compressibility term used in conventional reservoir simulator (CRS), does not account for change of porosity and permeability. This paper develops coupled geomechanics (CGRS) which accounts changes permeability related to deformation. The this adopts staggered grid finite difference method fluid flow displacements. Displacements pore pressures are placed at centers faces blocks, increases numerical accuracy. Four types nonlinear,...

In the 1990s, a new water management tool, downhole separation technology, was developed. It separates oil and gas from produced inside wellbore injects into disposal zone. Based on different fluid separators handle, they are categorised as oil-water (DOWS) gas-water (DGWS). Two types of have been used: hydrocyclone gravity separators. The authors reviewed previous 59 DOWS installations 62 DGWS worldwide, discovered that only about 60% achieved success. Some major issues—including high...

Interferometric synthetic aperture radar (InSAR) is a useful tool for monitoring surface uplifts due to groundwater rebound in abandoned coal mines. However, InSAR-based prediction has rarely been focused on so far, hindering the scientifical assessment and controlling of uplift-related geohazards wide area. In this study, we firstly revealed that temporal evolution caused by at point approximately followed an exponential distribution. Following result, varied cumulative distribution...

Summary This work presents a spectrum of possible derivative responses in wells producing commingled reservoirs. Three issues pertaining to reservoir buildup behavior are studied: (1) for systems, with emphasis on unequal layer radii; (2) pressure distributions the layers view toward understanding backflow, particularly origin rate reversals during buildup; and (3) an application Peaceman's probe radius formula obtain each at shut-in. Several approaches developed from Issue 1 estimate areal...

In 2008, Chinese playwright, director Stan Lai, and producer Wang Weizhong created the play 'The Village' based on over a hundred oral history stories. This is work of realist theatre that incorporates many comedic elements has been hailed by Beijing News as 'pinnacle our era'. However, current academic attention to this primarily limited studies focusing nostalgia historical context, with insufficient emphasis its aspects. study aims analyze comedy in using Kant's theory Chekhov's...

In order to solve the problem of coal mining under villages regions Yaoqiao Mine, through comprehensive analysis, author considers that strip has feasibility in realistic, meanwhile, a series width and retaining was studied for eventually project put forward meet unique conditions. By comparing application conditions range between continuous miner used type Wongawilli method shortwall shearer method, analyzes economic benefit draws conclusion better applicability. Those all provide new way...

ABSTRACT This paper introduces a new approach to model the performance of commingled reservoirs with pressure dependent fluid properties in each layer. With this approach, reservoir engineers can readily modify an analytical for slightly compressible liquids gas systems. We used numerical simulator verify approach. Based on and we developed computer which use unequal initial pressures different layers allows layer be homogeneous or dual porosity, hydraulically fractured have radial flow...

A deep-buried highway tunnel is constructed with complex geological condition which existing an alternation of soft and hard rock having feature high ground stress, extrusion, fall-block twisted phenomena supporting structure appear in many places during construction pose a serious threat to the safety construction. In combination process Shimenya tunnel, by using finite difference software FLAC3D, surrounding stability simulated, numerical calculation results advanced pilot excavation...