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Keywords: acidizing
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Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202759-MS
... main layers of Reservoir D reservoir. From core data, it was observed the micro fractures develop in D3 to D5. Oil production rate can reach 400-900bbl/d after acid wash in Reservoir D. Production index range from 0.23 to 0.42 which indicate the Reservoir D is a low productivity reservoir. So...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203330-MS
... In actual field treatments, VES are mixed with hydrochloric acid during pumping, with low viscosity. As the acid reacts with carbonate formations, calcium chloride will be generated, and pH will increase above 3.0, as shown in Figure 1 . As the pH increases VES start to bond to calcium ions and...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203411-MS
... The purpose of this study is to share a different insight from design to evaluation of matrix stimulation of long-interval heterogeneous reservoirs such as South Pars. We applied modified inverse injectivity method proposed by Safari et al. (2020) to find out optimum acid and diverter gal/ft...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203484-MS
... Table 1 DST Results of Well Y115 in Yamama Pool Choke (1/64″) Duration (hrs) WHP (psia) Bottomhole Pressure (psia) @13,270 ft. Oil rate (BOPD) Gas rate (MMscf/d) GOR(scf/stb) °API Gas S.G. (Air=1.0) 32 (pre-acid) 6.0 248 3,919 438 / 27.0 Build up 3.0...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203226-MS
... that added complexities to Frac Fluid selection. Finally, two Frac systems are selected for different segments of the lateral. After running a cemented casing, Six (06) Acid fracturing treatment and five (05) Proppant fracturing treatments are successfully executed in the lower and upper layers...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203239-MS
... tubing (CT) and flow to clean (FTC) packages to cleanup the well and if necessary to perform matrix acidizing to improve well productivity or injectivity. This paper highlights operational constraints of well commissioning and its effective approach from job design, execution and evaluation that have...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203248-MS
... Abstract Carbonate acidization is the process of creating wormholes in carbonate rocks by injecting acid to increase reservoir permeability and consequent oil production. Nevertheless, some reservoir oils might contain certain amounts of asphaltenes that affect the wormholing process. During...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203122-MS
... Abstract Various acids and chemicals have been developed to achieve retardation properties to enhance oil and gas production. Improving acid retardation through emulsification or polymer gelling agents has drawbacks. Retarded acid recipes including HCl, organic acids, and/or chemical retarders...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202895-MS
... Abstract Matrix acidizing is one of the most common well stimulation methods in Malaysian brown fields. Formation damage caused by fines migration has been reported to be among the main reason for productivity decline. The need to conduct acid stimulation arises when the initial rates of the...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202924-MS
...-hole zone of production well with chemical compositions characterized by different impact onto the oil and gas bearing formation: water-blocking agent; water solution of acid-surfactant composition. An application of a new water-blocking agent – emulsion system with supercharged nanoparticles (ESN) as...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202996-MS
... petroleum engineers well intervention acidizing fluid dynamics water saturation treatment fluid core sample permeability pressure drop rock mineral dissolution injection The decline in oil and gas production from conventional resources increases the important role of the unconventional...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203069-MS
... activated. Laboratory tests and simulated temperature defines the curing time. A step rate test is used to calculate the injectivity index and evaluate the need for an acid stimulation treatment before the consolidation system is pumped into the well. This test is repeated after curing time to evaluate any...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203484-MS
... testing acidizing production chemistry complex reservoir drilling operation multistage fracturing high gor crude hydraulic fracturing directional drilling pvt measurement drillstem/well testing structural geology ht environment reservoir characterization reservoir surveillance completion...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203411-MS
... different phases of development project of the reservoir. The objective of this study is to introduce a new approach to figure out optimum acid volume (gal/ft), compare the effectiveness of diverters, calculate stimulation ratio (SR), and forecast post-acid production behavior from surface treating data...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203466-MS
...-acid stimulation treatment has been poor control of the acid placement along the reservoir section to total depth (TD) without stage equipment or chemical diverters. The limited-entry liner (LEL) lower completion addresses the shortcomings of other stimulation techniques. It consists of a number of...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202615-MS
... Abstract Historically, the preferred method for restoring production on oil producers in a mature field in South Europe (Field A) was bullheading a matrix acid stimulation treatment. Even if successfully implemented, bullheading treatments at matrix rate are not always optimum and, for Well A...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202612-MS
... acid fracturing treatments, caused by leaks at the openhole isolation packers. Consequently, sizeable portions of the target reservoir remain unstimulated. The loss of isolation between stages can be detected during ball landing, followed by an injection test in the subsequent zone. When treating...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202620-MS
.... A review of 25 well interventions (WI) delivered to extend the life of those wells is covered, including nitrogen lift, acid wash, milling, shifting sleeves, setting packers, stimulation, Velocity Strings (VS), and fishing. In order to overcome logistic issues related to wells in remote locations...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202658-MS
... with electrical wires, optical fibers, and, in the last year, hybrid wire-optical fiber tubes. In this paper, a new telemetry system consisting of multiple single-point sensors in the bottom hole assembly (BHA) and CT-conveyed electrical wire is reported to help optimize matrix acidizing stimulation in...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202661-MS
... Abstract A new solution to stimulate carbonate formations with bedding water or a gas cap was proposed. It is a combination of acid jetting and Perfobur radial drilling technology. Perfobur is a technology of a mechanical radial drilling with using of slim mud motor. The main advantages of the...

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