...-Darcys. This paper proposes an alternative pulse-decay technique that offers accurate permeability measurements within a considerably short time frame. A radial-flow pulse decay method with a new experimental design is developed, which employs two gas reservoirs of the same volume and two pressure...

... Abstract For tight oil reservoirs, primary depletion using multistage hydraulically fractured horizontal wells typically only recovers between 5 to 15% of original oil in place, and can exhibit an exponential decline in production rates within a few months. Various enhanced recovery techniques...

... material balance equation (MBE) to forecast the performance of shale oil reservoirs under natural depletion and huff-and-puff gas injection scenarios. For undersaturated reservoirs, recovery is calculated from the proposed MBE explicitly using a multiporosity effective oil compressibility. For saturated...

... Abstract Natural fractures, fissures, and microfractures are well-known contributors to production performance of shale reservoirs. Complex fracture geometries can be generated by either small-scale fracturing, DFIT, or large volume fracture stimulation, because the activation of pre-existing...

... Abstract This paper develops innovative methods for analysis of some important exploration and production problems in shale petroleum reservoirs such as the determination of burial maturity and maturation trajectories, and determination of sweet spots with the use of Modified Pickett plots...

... Abstract Confidently establishing single well and/or aggregated production profiles, particularly estimated ultimate recovery (EUR), is both an important and challenging process in unconventional reservoirs. Numerous papers have proposed forecasting techniques, but four fundamental approaches...

... Abstract Oil recovery worldwide from conventional reservoirs vary significantly from case to case, but it is sometimes presented at an approximate average of 30-35 % of the original oil in place (OOIP), including primary and secondary recovery. This study shows that proper implementation...

... influential parameters that impact deliverability of wells. Results from single point statistical analysis were further extended to unsupervised discrete classification using neural-network to bin the reservoir. Binning classification was then used to design and optimize hydraulic fracture parameters...

... Abstract In recent years, gas huff-n-puff has proven to be a potential EOR method in unconventional reservoirs. The main mechanism is that the injected gas will penetrate the reservoir matrix and diffuse into the oil phase to extract oil. Gas penetration into the reservoir and oil phase...

... in these complex plays is inevitable. In shale oil reservoirs, EOR is relatively novel compared with in conventional oil reservoirs. The most investigated technique among EOR methods to be applied in shale oil reservoirs is injecting miscible gases which mainly include CO 2 , N 2 and enriched natural gases...

..., and mineralogy of actual tight reservoir rocks. To generate the desired dual-permeability system, fractures are simulated by creating sand-filled branched pathways in the large synthetic core. During a coreflood test, fluids are injected through the peripheral high-permeability belt into the tight matrix...

... Abstract This paper presents the successful implementation of an innovative approach for improving oil recovery by water injection optimization with Injection Control Devices (ICD's) in unconventional reservoirs. Over the past decade, operators in Southeast Saskatchewan have been continually...

... the data was easiest to interpret, the incremental production has doubled since the huff-n-puff project started. This paper also proposes methodologies for implementing second generation pilots for unconventional reservoirs. It is important to define clear objectives that characterize the value...

... Abstract Diagnostic Fracture Injection Test (DFIT) responses in some shale reservoirs, such as the Duvernay shale in western Canada, are not consistent with those interpreted through traditional analysis methods. Indeed, interpretation with traditional techniques may result in significantly...

... Abstract The primary goal of this work is to demonstrate that the fractal geometry can be used to accurately model the rate and pressure performance behavior of highly heterogeneous reservoirs such as shale oil/gas reservoirs. There are multi-scale heterogeneities that can hinder modelling...

... diffusivity applies, as well as high-drawdown, multiphase phenomena, exotic diffusion mechanisms and/or compaction effects. This paper explores the interplay of the individual linear flow parameters by testing various reservoir and stimulation properties via numerical models (i.e. synthetic cases...

... Abstract Evaluation of enhanced liquid recovery from tight or shale reservoirs is currently of great interest to operators. One reason is the low primary oil recovery of tight/shale reservoirs, which ranges between 5-10% ( Shoaib and Hoffman, 2009 ) even after expensive multi-stage hydraulic...

... gaining popularity also employs the use of a cemented liner but with sliding sleeves allowing for single point entry into the formation (pinpoint). The objective of this paper is to compare the expected and observed reservoir performance resulting from each of these approaches. To accomplish...

.... This paper investigates the applicability of feasible EOR methods and determines their technical and economic success over the natural depletion process under different well and fracture designs. Additionally, the study investigates the minimum reservoir permeability required for success. To achieve...

... Abstract Low primary recovery percentages from unconventional reservoirs have long motivated interest in Enhanced Oil Recovery (EOR) for these reservoirs, resulting in numerous simulation studies and injection pilots. However, performance from injections pilots has typically been disappointing...