... Abstract The introduction of Perforate, Wash and Cement (PWC) techniques have delivered a step-change in annular cement remediation efficiency versus conventional methods. The development of Tubing-Conveyed Perforating (TCP) charges capable of perforating production casings without damaging...

... The tests were performed using API Class G HSR cement, water, strength retrogression additive, microspheres, thermal enhancer, flexible additive, fluid loss additive, dispersant, anti-settling additives and defoamer. 2 types of strength retrogression additive (silica flour) were used one...

... are added to this integrated framework to account for the key concerns due to the presence of CO2 in the system: The cement-CO2 geochemistry "add-on" module evaluates the phenomenon of cement's self-sealing/self-degradation behaviour. Carbonated water reacts with cement minerals; some of which...

... enhanced safety and permanence in the same reservoirs that have securely held oil and gas for millions of years. This paper explores the benefits of deploying novel cementing technology in CCS wells in Eastern Australia. CO 2 injection leads to a corrosive environment, which can cause cement sheath...

.... This necessitated further planning, such as adjusting the length of the liner and performing off-bottom cementing. All whilst ensuring the lower completion, featuring inflow control devices (ICDs), could be run unhindered. TAML level 4 junctions require precise planning, orientation, and access. The integrity...

... barrier envelope can cause immediate gas release. The presented case is an oil well handed over to operation with poor cement coverage under dispensation and risk assessment since it is not complying with integrity standards. During well barriers evaluation and commissioning, SAP B problem...

... Fig. 5a shows the ultrasonic sensor placement on a rotating sub and the propagation of the signals. Two sets of ultrasonic transducers are placed opposite to each other (180°). The side with the single transducer provides the traditional ultrasonic measurement, which provides cement acoustic...

... and remarkable successes. Over 70 wells have been meticulously drilled and brought into production. Upon completion, the operator faces the critical task of ensuring well integrity, which hinges on the cement's performance against each section of the casing under scrutiny. There are two types of well designs...

... For repairing cement to cure SAP in B annulus, there are different options, for cement that is highly bonded to the casing but exhibit micro-annulus with cross flows, technologies around steel removal as standard section milling or dual/triple casing section milling are to remove casing...

... In this context, if feasible, casing removal should be limited to that required to establish a sound environmental barrier. Casings within the zone where the primary and secondary barriers are to be located could be left in place if they are structurally sound, and perforation, wash, and cement (PWC) methods...

... In the absence of an effective contingency plan, these losses can have significant impact on overall well time and cost. Due to the nature of such losses, the conventional lost-circulation material (LCM) pills are rarely effective and often numerous cement plugs are required ( Arshad et al. 2015...

... a potential raw material source that allow to move forward into geopolymer cement free slurry design. Geopolymer slurry design For the design of the geopolymer cement-free slurry we defined a typical design used for a standard surface casing. This single slurry meets the below requirements, using...

... Abstract Successful placement and curing of cement behind casing is critical for the environment, operational safety, economics and lifespan of any oil and gas well. Cement bond logging technologies have evolved, from basic CBL, to include different measurement physics, sensor technologies...

... considering the consequences on the set cement. This case study will be focusing on drilling activities on offset wells, evaluating & exploring how mud weight changes can affect wellbore instability and damage the cement sheath despite the fact that the cement evaluation logs showed good results days...

... During venues related to cement quality, shareholders, stakeholders, and suppliers shared and presented findings, lessons learned and best practices to improve zonal isolation. The outcomes of studies, workshops and committees could be divided into the following three categories: Abstract...

... Circulating Density (ECD), wellbore stability, hole cleaning and stuck pipe. Technological changes were implemented, including the utilization of newly developed spacers and cement slurries to achieve competent cement behind 9-5/8" casing for reservoir sealing, the use of circulating subs across open...

... Abstract This article discusses the big volume top job of oil and gas wells, specifically wells A and B which were drilled in Kuwait. The process involves pumping a larger volume of mixture of cement, water, and other additives into the annulus to seal the wellbore, prevent fluid migration...

... and the line top inflow testing are time consuming, especially in challenging well environments. The paper documents executed two case studies that illustrate how a Systematic Risk Control Approach enables the execution of drilling out cement, negative Test, Wellbore clean out, and Casing Pickling...

... Sonic tool or acoustic based cement evaluation tool measures and record the amplitude, the travel time and waveform which will be translated into Cement Bond Log (CBL), Travel Time and Variable Density Log (VDL) respectively. The basic tool configuration includes one transmitter and two (2...

... united kingdom government asia government gas injection method petroleum play type geologist sustainability sustainable development complex reservoir reservoir geomechanics requirement assessment cement geological subdiscipline co2 scenario feasibility social responsibility co 2 uae...