Journal of China University of Petroleum (Edition of Natural Science)

An inversion method to calculate horizontal well flow profile using temperature data based on Adam optimization algorithm

In order to improve the efficiency of water injection and design a finely stratified production and injection workflow, an efficient detection of the injection and production flow profile along a horizontal well is required. In this regard, a method based on the adaptive moment estimation optimization (Adam) algorithm was proposed to inverse the injection and production profile in a horizontal well using the temperature data. First, a temperature distribution model in both the reservoir and wellbore was applied to construct an inversion target function. Secondly, the Adam optimization algor

Application of blockchain in petroleum exploration and development data sharing

Today’s systems, approaches, and technologies leveraged for managing oil and gas supply chain operations fall short in providing operational transparency, traceability, audit, security, and trusted data provenance features. Also, a large portion of the existing systems is centralized, manual, and highly disintegrated which make them vulnerable to manipulation and the single point of failure problem. In this survey, we explore the potential opportunities and applications of blockchain technology in managing the exploration, production, and supply chain and logistics operations in the o

Method of double drilling fluid circulation for cuttings carrying in large-size wellbore during deepwater drilling

The increasing oil demand around the world along with the depletion of onshore and shallow water oil reserves have forced the oil companies moving into the development of deepwater subsea hydrocarbon reservoirs. Drilling fluids play a key role in all drilling operations, but they get a greater relevance in deepwater environments where the technological challenges of drilling at these extreme conditions generate significant operational risks as well as very high costs during the development of this kind of fields. The operational issues and concerns related to the drilling fluid design and a

Leakage-control while drilling with novel hybrid gel particles system

Novel fibrous and particulate LCM products of variable mechanical characteristics and chemical composition were developed using physio-mechanical treatment and processing of various waste components of date palm trees available each year as pruning wastes, post crop harvesting wastes, waste generated after making cookies and confectioneries and also the waste arising due to the removal of deceased and non-productive date trees. Experimental tests conducted using PPT apparatus at 500 and 1500 psi pressure and 250 °F temperature using 2 mm slotted disc demonstrated the efficient sealing a

Sandbox physical modelling with multiple detachment layers and its implication on structural evolution of East Sichuan Fold Belt

The Eastern Sichuan area is a typical fold-and-impulse zone. It is bounded by the Qiyue Mountain fault, with septal folds on the east and on the west. Based on previous geological mapping and surface geological structure research as well as the fault-related folding theory, in this study, tectonophysical simulation experiments were conducted to investigate the tectonic geometry and kinematics of the Eastern Sichuan fold-impulse zone. The experiments were conducted by selecting different experimental materials and changing the physical properties of the cover, the friction between the cover

Journal of China University of Petroleum (Edition of Natural Science)