Carbon Capture, Utilization, and Storage (CCUS) stands as one of the effective means to reduce carbon emissions serves a crucial technical pillar for achieving experimental neutrality. CO

ASP flooding is an important method to further improve oil recovery by a large margin. At present, it has entered the stage of industrial application, but there are still problems scaling in injection production system and high maintenance costs. Based on industrialized mature technology weak alkali flooding, sodium chloride used replace carbonate, alkali-free three-component (TC) Daqing Oilfield developed mixing with petroleum sulfonate partially hydrolyzed polyacrylamide. experiments...

Abstract Multi-cluster fracturing technology was often used in horizontal well reservoir reconstruction to achieve production increase, which also affected casing equivalent stress distribution. This paper focuses on multi-cluster and establishes a model line with the reality. The three-dimensional finite element of fracture-formation-cement sheath-casing proposed, influence cluster spacing number studied. On this basis, single segment 8-cluster developed. rock elastic modulus, inner wall...

There are many mature oil fields in the North Sea. One of them is Clair Oil Field, located on United Kingdom Continental Shelf (UKCS) Scotland. This field unique because results failure studies several fluid injections, constituting secondary and tertiary recovery techniques, increasing production. Only waterflooding has shown a promising future. In this paper, three-dimensional (3D) numerical simulations investigate influence infill drilling optimization by Field so as to maximize net...

Introduction Peripartal cows are susceptible to a negative energy balance due inadequate nutrient intake and high requirements for lactation. Improving the metabolism of perinatal dairy is crucial in increasing production cows. Methods In this study, we investigated impact rumen-protected branched-chain amino acid (RPBCAA) on performance, lipid metabolism, oxidative stress, immune function primiparous using metabolomics through single-factor experiment. Twenty healthy Holstein were selected...

Abstract During hydraulic fracturing, there has been little research on casing tensile stress distribution from the tilting area to horizontal in whole string. In order study bending sections during a three-dimensional finite element mechanical analysis model of casing–cement–formation was established. The showed that: When cement missing, decreased with situ difference increasing, and increased when middle or target missing. internal pressure continuously, first then increased, 20 MPa,...

Breakthrough pressure of natural gas in rock is an important evaluation parameter reservoir development. In this study, experimental measurements porosity and permeability the caprock core were carried out. A digital model was obtained by body rendering CT (Computed Tomography) slices using Avizo software. Then, grid imported into Fluent software for a numerical simulation breakthrough core. The innovations paper include (1) accurate calculation method cap based on VOF method; (2) performs...

An in-situ combustion method is an effective to enhance oil recovery with high economic rate, low risk, fast promotion and application speed. Currently, technique regarded as the last feasible thermal technology replace steam injection in exploitation of bitumen sands heavy reservoirs. However, oil-discharging mechanism during process still not clearly understood. In this paper, has been numerically simulated based on Du 66 block. The effect production parameters (huff puff rounds, air...

Abstract Microbial oil recovery (MEOR) technology has a wide application prospect in the field of enhanced low-permeability reservoirs, and genetic engineering plays an important role. At present, oil-production bacteria constructed by are mainly used to obtain high metabolites strong environmental adaptability; there few reports on genetically engineered with different functional metabolites. However, which could efficiently produce one metabolite have poor ability other Therefore, order...

Abstract Daqing Oilfield as the world’s largest application area of alkali–surfactant–polymer (ASP) flooding, in recent years, with increase aging wells, eccentric wear and deformation sucker rod pipe during oil production has become more serious. In order to study effect emulsion lubrication ternary composite flooding on tubing, this paper establishes a calculation model for depth tubing under different conditions through indoor friction experiments combined White Dawson efficiency theory....

The microbial combination flooding is a method of enhanced oil recovery, which use the composite system produced by biopolymers and bio-surfactants to drive oil. In this paper, we chose B2/DJ through stability test, study experimental indoor with composite, it drew conclusion that recovery was improved obviously after water flooding. 13%.

Underground gas storage (UGS) is a beneficial economic method of compensating for the imbalance between natural supply and demand. This paper addresses problem lack research on two-phase distribution pattern seepage law during water–gas alternated flooding in reservoirs. The study constructed three-dimensional digital core aquifer reservoir based Computed Tomography (CT) scanning technology, extracted connecting pore structure to establish tetrahedral mesh model. A microscopic model was...

Phase separation of microemulsions occupies a key position in many applications, such as oil recovery, nanomaterial synthesis, and chemical reactions. Achieving an intelligent response is crucial to microemulsion development application. For this reason, study, CO

Component transportation is one of the main mechanisms for numerical simulation in microbial oil recovery. However, research on component considering inhibition metabolites very limited. A mathematical model displacement a microorganism system including growth and metabolism equation, transport porous media physical property variation equation was established this paper. The discretized solved by implicit pressure explicit saturation. MATLAB results showed that chromatographic separation...

The M block in Liaohe Oilfield uses steam huff and puff coupled with water flooding, it has entered the middle-later period of oilfield development. To keep stable yield, development mode should be changed. Based on geological characteristics block, this paper puts forward two different ways: Horizontal well injects to drive; as product when vertical steam. Combined practical data using numerical simulation analysis, results show that: Well driving is best way; recovery percent high 22.72%....

MEOR has advantages of less polluting environment and low cost, which can be extended to the volume biopolymer produced by metabolism, it is one main mechanisms microbial enhanced oil recovery. The fermentation, study biopolymers growth metabolism bacteria rules; after using orthogonal experimental method optimized optimum culture conditions, through indoor driving evaluation biological polymer flooding effect. optimal bio producing strain DJ was screened out. had ability produce product...

Development of the reservoir in A block Liaohe Oilfield present compound rhythmreservoirs, high permeability layer among reservoir, according to realsituation that exist, for efficient utilization producingremaining oil by horizontal well, need optimize locations, trajectory, lengthof well. fine geological model which reflects characteristicsof studied area was constructed with Petrel and CMG software. Optimizelocations, length well vapor injection parametersupon history matching. The...

This paper tries to sum up every development indicator of the deep oil profile control and displacement effect evaluation in oilfield, through study method terms effect, it establishes a set index systems as for evaluation, including injection well production blocks these three aspects. It aims make software flooding H-12 Well is tracing with help software, results show that obvious.

Four bacterias were separation and purification from oil well produced water of Daqing 9 factory, optimizing two degrading 17# 7#. Through fermentation cultivation, observing their growth metabolism laws the viscosity crude before after action. Results showed that strains 7# thick degradation rate 84.9%, 73.9% respectively. experiment contrasts, give composition changes chromatogram Finally, choose as oil-degrading bacteria for industrial fermentation.

Pulse water injection is widely used in tertiary oil recovery. This study aims to reduce the pulse frequency, control frequency at 0.033∼0.1 Hz, simulate pressure change formation 0.1 Hz and 100 mD through COMSOL, combine core displacement experiment determine frequency. The effect of permeability on recovery factor cut agent summarized as follows: when 0.033∼0.066 100, 300, 500 increases by 0.25, 0.34, 0.39 percentage points, respectively, these data can be low method proposed this paper...

With the rapid development of economy, demand for oil is increasing day by day. MEOR has advantages low cost and no pollution to environment, attracted widespread attention. In this paper, dynamic characteristics microbial enhanced recovery were studied laboratory experiments. The result showed that all flooding rate could reach more than 5%, total 35% if injection period composite system was advanced, whole displacement process be shortened workload would reduced.

Compared with oil, natural gas has been the focus of energy industry in recent years. Renewable is goal and trend future developments, it made considerable progress; however, not reached ideal popularization rate. Therefore, still very important so far. In this paper, influence thermal injection room temperature on reservoir recovery analyzed, method water plugging by hot tight put forward. Indoor simulation experiments were carried out to evaluate effect hot-gas cut pore degree blockage. On...

Through the cultivation of two polymer-producing strains WP1, SP1, determined suitable growth temperature bacteria, followed by fermented, we research and metabolite changes on viscosity pH values. Results show that at 80 r/min, 120 r/min training conditions, strain WP1 is all more than 100mPa•s, experimental works better SP1. Therefore, selected identified as microorganisms in thick oilfield combination flooding produced polymers, this last.

Firstly, two biosurfactant-producing bacteria named 1# and 2# was selected from 7 strains. Secondly, their growth metabolism laws that the quantity of metabolic products would reach highest value surface tension bottom out in stationary phase found culture flask. Thirdly, optimal condition for fermenting chose by orthogonal test which used to study effect constituent fermentation medium, culturing temperature rotation speed shaking table on capability metabolizing biosurfactants. Finally,...