... Abstract The length of horizontal wells in deep carbonate reservoir (5000∼6000m) in Sichuan Basin of China has exceeded 2000 meters. Both generating acid-etched fractures and acidizing the dispersed pay-zone are the key to achieving optimal production. The complex conditions of multilayers make...

... Abstract Acid matrix stimulation is a widely used method to improve well productivity by removing and/or bypassing damage in the near wellbore area and creating channels for hydrocarbon flow. Hydrochloric (HCl) and organic acids are commonly used to design fluid recipes utilized...

... Abstract Acid fracturing is a common stimulation technique used on low permeability carbonate reservoirs to enhance the productivity and deliverability of hydrocarbons. The success of acid fracturing treatments ultimately depends on the created fracture geometry, complexity and surface area...

... deployment challenges during the lower completion phase. There was an opportunity to address these challenges for the second well, in the deployment of well -1 which from an operational perspective was textbook. In the search for an improvement to the Productivity index (PI), multi-lateral acid jetting...

... In Figure 5 , a maximum reduction in the injected volume of acid reached 50% with a centred notche at lowest rate (1 ml/min) when compared to the baseline test. 15% reduction of the volume of acid was recorded compared to the shifted notche case at the same flow rate. This is a very interesting...

.... machine learning upstream oil & gas surrogate component crude oil artificial intelligence eacn acid pvt measurement enhanced recovery molecule linear alkane alkane study field digital oil model equivalent alkane carbon number surfactant international petroleum technology conference...

... Abstract Stimulation of carbonate reservoirs using suitable acid systems is common practice to alleviate damage caused by the drilling and completion operations and to increase permeability by way of acid fracturing operations in tight formations. This process creates conductive channels...

... Viscoelastic surfactants (VES) have been successfully applied as acid-diversion fluids. However, high temperature, interaction of VES and metallic cations, alcohol-based additives, and chelating agents all interfere with the apparent viscosity of the VES-based acid and reduce its efficiency...

... Chang , F. F. , Nasr-El-Din , H. A. , Lindvig , T. , . 2008 . Matrix Acidizing of Carbonate Reservoirs using Organic Acids and Mixture of HCl and Organic Acids . Presented at the SPE Annual Technical Conference and Exhibition , Denver, Colorado, USA , 21-24 September...

... Saudi Arabian Chevron (SAC) partnered with the Texas A&M University Petroleum Engineering Department and Reservoir Productivity Geomechanics Team of Chevron's Energy Technology Center (ETC) to perform acid fracturing conductivity tests on the Ratawi Limestone core samples. These tests were...

... Acid stimulation in low permeability carbonates is challenging and the performance depends on a good choice of acid recipe and comprehensive testing that supports the extent of wormholes or fracture patterns. In this paper, a comprehensive testing proposal that involves initial enhancements...

... Acid fracturing is a widely accepted method for stimulation of carbonate reservoirs. A new high-resolution fracture hydrodynamics and in-situ kinetics model integrated on a reservoir-centric exploration and production platform improves acid fracturing simulation accuracy and performance...

... CT (coiled tubing) acidizing is the main work before horizontal wells put into production in the Middle East. The targeted stimulation interventions directly affect the afterwards performance of production and injection wells. This work not only highlights the importance of removing damage...

... A novel technique in acid stimulation to attain uniform and effective coverage described in this paper has been adopted to treat large multiple carbonate intervals simultaneously. This technique has been proven to improve efficiency, increase recovery, and sustain production rate. Zones Z1, Z2...

... Abstract Considering characteristics of complex carbonate reservoirs (e.g., high depth, high temperature, and fracture cave development), this paper simulates expansion of the acid wormhole when combining diverting acid and a solid diverting agent for acid fracturing. Using the theory...

... machine learning BHT Drilling frac start month box plot concentration acid failure decrease proppant hole size international petroleum technology conference probability Lind , Y.B. , Kabirova , A.R. 2014 . Artificial Neural Networks in Drilling Troubles Prediction...

... Abstract Matrix acidizing is an essential strategy to maintain or increase productivity or injectivity of hydro-carbon wells. However, for loose sandstone reservoirs, the rock skeleton structure is easily de-stroyed by acidizing with conventional acid systems, which results in sand production...

... between wells and layers. In this case, the technique of radial fracture network fracturing and deep plugging has been proposed. Meanwhile, the matching products which include variable viscosity diverting acid, micro expansion high strength plugging agent and temporary plugging agent (oil soluble, water...

.../182554-MS Bekibayev , T. T. , Beisembetov , I. K. , Assilbekov , B. K. 2015 . Study of the Impact of Reduced Permeability Due to Near-Wellbore Damage on the Optimal Parameters of the Matrix Acidizing in Carbonate Rocks . Presented at the SPE Annual Caspian Technical Conference...

... Investigation of the effectiveness of matrix stimulation treatments for removing drilling induced damage in Akita region in northern Japan is of interest due to the presence of large quantities of acid-sensitive minerals, such as analcime. Feasibility study of the sub-commercial field...