Summary Preformed particle gel (PPG) has been successfully synthesized and applied to control excess water production in most of the mature, waterflooded oil fields China. This paper reports on laboratory experiments carried out investigate PPG transport mechanisms through porous media. Visual observations etched-glass micromodels demonstrate that propagation media exhibits six patterns behavior: direct pass, adsorption, deform snap-off shrink trap. At macroscopic scale, can be described by...

The recent success of Large Language Models (LLMs) has gained significant attention in both academia and industry. Substantial efforts have been made to enhance the zero- few-shot generalization capabilities open-source LLMs through finetuning. Currently, prevailing approach is instruction-tuning, which trains complete real-world tasks by generating responses guided natural language instructions. It worth noticing that such an may underperform sequence token classification tasks. Unlike text...

Shale gas resources are abundant in China and have been discovered some areas. They widely distributed the Cambrian, Ordovician Silurian strata Southern China, with technically recoverable accounting for 3/4 of whole country. The will be main area shale development. Compared North America, there a lot differences exploration development which include intensive tectonic movements marine shale, complex stress field, deep burial depth, special surface condition, etc. With those, it could...

This paper describes Preformed Particle Gel (PPG) treatments for in-depth fluid diversion in four injection wells located the northern section of Lamadian reservoir, Daqing oilfield, China, which is a sandstone reservoir with thick heterogeneous pay zones. Forty-six producers were connected to treated injectors an average water cut 95.4% before PPG treatments. A large volume (more than 1 000 m<sup>3<sup/>) suspension concentrations 1900-2 500 mg/L and particle sizes 0.06-3.0 mm was injected...

Antimicrobial peptides (AMPs) from the skin secretions of amphibians are now considered as a potential alternative to conventional antibiotics. Phylloseptins family AMPs identified in Phyllomedusinae tree frogs which exhibit highly conserved structural characteristics. This study examines structure-activity relationship newly discovered phylloseptin, Phylloseptin-PHa (PSPHa) Pithecopus hypochondrialis.PSPHa and modified analogs were produced by solid phase synthesis purified reverse-phase...

Abstract Injecting preformed particle gel (PG) as a fluid-diverting agent to reduce water production is an attractive new procedure designed minimize some of the risks inherent in treatments based on in-situ gelling. The objectives this paper are: (1) understand how control PG properties by changing gelant compositions and their fraction when synthesized; (2) determine where can be applied reservoir conditions affect properties; (3) outline candidate well criteria proper injection procedures...

Abstract Preformed particle gel (PG) has been successfully synthesized and applied to control excess water production in some mature water-flooded oilfields China. Investigations show that PG is strength- size-controlled, environment-friendly, stable over long periods of time, very likely capable overcoming drawbacks inherent treatments based on in-situ gelling. Its thermostabilization not sensitive reservoirs minerals formation salinity. To support its future applications, this paper...

Pressure disturbance propagation was investigated using the steady state replacement method, relationship between moving boundary and time obtained. An unstable seepage model in shale gas reservoirs established considering effects of desorption, diffusion, slip boundary. Using Laplace transform, pressure characteristics equation solved for condition internal being constant production outer Subsequently, combining parameters southern China, its influence factors reservoir were analyzed MATLAB...

Knowledge graph embedding aims to embed entities and relations into low-dimensional vector spaces. Most existing methods only focus on triple facts in knowledge graphs. In addition, models based translation or distance measurement cannot fully represent complex relations. As well-constructed prior knowledge, entity types can be employed learn the representations of this paper, we propose a novel model named TransET, which takes advantage more semantic features. More specifically, circle...

This study focuses on enhancing the inference speed of laparoscopic tool detection embedded devices. Laparoscopy, a minimally invasive surgery technique, markedly reduces patient recovery times and postoperative complications. Real-time helps assisting laparoscopy by providing information for surgical navigation, its implementation devices is gaining interest due to portability, network independence scalability However, often face computation resource limitations, potentially hindering...

Abstract Objective TQB3602 is a novel orally bioavailable proteasome inhibitor. This study the first‐in‐human phase I clinical trial to evaluate safety, tolerability, pharmacokinetics, and preliminary efficacy of in relapsed/refractory multiple myeloma (RRMM). Methods multicenter consisting 3+3 dose‐escalation dose expansion phase. Patients with MM who have received ≥2 prior antimyeloma therapies were enrolled. administered at 0.5~7mg on days 1, 8, 15 28‐day cycle. Results Twenty‐five RRMM...

The inorganic gel coating diverting agent, which is non-toxic and environmentally friendly, developed for in-depth water diversion to improve flooding effect. After being injected into the formation, agent reacts with formation forms silicate a density approximating water. suspends in as bulk or particulates, scales on rock surface by way of adsorption. dominant channels deep are narrowed, forming flowing resistance forcing flow subsequent fluid so This features fast solution, temperature...

Preformed Particle Gel for Conformance Control: Transport Mechanism Through Porous Media Baojun Bai; Bai Research Institute of Petroleum Exploration and Development, PetroChina Search other works by this author on: This Site Google Scholar Yuzhang Liu; Liu J-P Coste; Coste Liangxiong Li Paper presented at the SPE/DOE Symposium on Improved Oil Recovery, Tulsa, Oklahoma, April 2004. Number: SPE-89468-MS https://doi.org/10.2118/89468-MS Published: 17 2004 Cite View Citation Add to Manager Share...

Macromolecule networks were introduced into the of normal sopping swelling materials by redesigning molecule structure, and thus forming with characteristics retarding swelling, high strength structure interpenetrating networks. The microscopic was analyzed TEM SEM, homogeneous observed from SEM images. Its static water absorption performance mechanical after indicate that total time particles, which can be suspended dispersed in water, is more than 20 days. After modulus elasticity (G′)...

Abstract TARIM is the largest basin abundant in carbonate reservoirs China. Acid fracturing main technology for exploration and development reservoirs, which featured with great depth (4500–7200m), high temperature (250–320F Degrees) extreme heterogeneity due to fracture formation. If azimuths of natural fractures in-situ stress match azimuth fracture-and-cavern area from well, acid treatment would generate good effect general; otherwise, will be non-ideal. A novel diversion (acidizing)...

Abstract Most of oil fields in China have stepped into the middle or later stage waterflooding life, and wells begin to appear above water. In conventional acid treatment, fluid always flows pore path with high water saturation firstly, broadens filled However, it can't stimulate as well that To solve this problem, especially heterogeneous formation, paper indicates a novel selective emulsified system, which viscosity will increase when meets decrease formation. The core flooding experiment...

Abstract Gel treatments have been implemented as a cost-effective method for plugging high-permeability zones and thus improving sweep efficiency in reservoirs. However, when extensive cross-flows exist between formation layers, near wellbore gel become less efficient. Polymer was used polymer flooding to increase the viscosity of injected fluids order improve oil recovery. is limited by dramatic loss (80–90%) caused various shearing degradations during injection process transport at...

The accuracy of the line-of-sight aviation photoelectric optoelectronic stabilization platforms is limited by two factors: external disturbance and sensor noise. An extended state observer (ESO) can effectively improve their anti-interference ability. However, due to serious problem gyroscope noise, further improvement an ESO’s suppression effect limited. This article proposes a control structure that combines Kalman filter (KF) ESO, improving upon interference ability traditional ESO under...