Underground gas storage (UGS) is usually constructed in a formation with complex geological characteristics, which makes the operation monitoring and safety management of this facility more difficult. This paper aims to develop method for comprehensive stability evaluation multiple salt caverns UGS interlayers. An index system established as foundation analysis evaluation, includes six important factors: cavity shape, pressure, interlayer parameters, surrounding rock mechanical properties,...

Underground natural gas storage (UNGS) is an important part of the supply system to ensure a balanced energy supply. The surface system, as storage, undertakes functions injection and production its investment economy vital importance. In fact, UNGS pipeline network has two-way characteristics, which different from one-way characteristics conventional oil&gas gathering transportation systems. This paper takes minimum objective function, considers withdrawal flow conditions esablishes mixed...

Natural gas transmission network is the major facility connecting upstream sources and downstream consumers. In this paper, a multi-objective optimization model built to find optimum operation scheme of natural network. This aims balance two conflicting objective named maximum specified node delivery flow rate minimum compressor station power consumption cost. The decision variables involve continuous discrete variables, including rate, number running compressors their rotational speed....

Abstract Salt cavern underground gas storage (UGS) has attracted more and attention worldwide for high peak shaving efficiency short-term throughput. To ensure the safe operation of this type UGS, it is necessary to evaluate analyze its stability. This paper investigates influences interlayers interactions on salt UGS's A 3D geomechanical model double-salt UGS with established based geological data creep constitutive relation rock. Based long-term numerical simulation, interlayer number,...

Helium, recognized as a scarce and vital strategic resource, is predominantly extracted from natural gas through the cryogenic separation method. Nevertheless, conventional processes are plagued by challenges, such elevated energy consumption, diminished helium extraction efficiency, escalated production costs. Through study of various methods their technological characteristics, this paper proposes novel cryogenic–membrane process coproducing ethane. Simulation was performed with Aspen...

Underground natural gas storage (UNGS), usually regarded as one of the most important storing and peak shaving method today, has been widely used in various parts world. The pipeline gathering system plays a key role UNGS surface engineering. Thus, optimization whole is crucial to lower total investment. However, we cannot find that any scholars have published related papers on network for at present. This paper focuses two-level star field construction, establishes mixed integer nonlinear...

Natural gas transmission networks (NGTNs) are the main facility connecting upstream sources and downstream consumers. For a cyclic NGTN with multiple routes, different transportation schemes will affect not only energy consumption of system but also pipeline costs paid by In this paper, three operation optimization models established to determine optimal operating state multiroute under scenarios. The mathematical correspond objective functions: minimize cost compressor consumption, expense...

Underground gas storage (UGS) is an important facility to overcome the imbalance between natural supply and demand. In this paper, optimization model of injection-withdrawal scheduling for UGS in a depleted reservoir established find optimal operating state facility. Faults are widely developed reservoir, which can divide full into several pressure disconnected blocks (RB). Considering that unbalanced distribution will significantly affect stable operation UGS, aims minimize deviation degree...

Depleted gas reservoirs type underground storage (depleted-UGS) are important facilities used to solve the imbalance of natural supply and demand. However, has high energy consumption, depleted-UGS faults widely distributed divided into multiple disconnected blocks. Excessive pressure variation between reservoir blocks (RBs) will affect stability operation. A multiobjective optimization model is established economic security scheduling problem depleted-UGS. The takes RB consumption...

Long-distance gas pipelines generally have complex, undulating sections. Trapped air pockets are often present at the high points or ends of pipelines. This article carries out an experimental research to figure transient changes. First all, under condition using pig with 231 g and injection pressure 0.3 MPa, hydraulic pulse increases from 0.31 0.54 MPa as liquid level rises 1 8 m. And m, grows 0.75 0.95 MPa. When interception mass is located blind side pipeline's end, decreases 4.9 3.21...

Gas gathering pipeline network system is an important process facility for gas field production, which responsible collecting, transporting and purifying natural produced by wells. In this paper, optimization model the layout of star-tree in discrete space established to find most economical design scheme. The decision variables include valve set position, station position connection relation. A series equality inequality constraints are developed, including node flow balance constraints,...

The optimization of the layout surface gathering and transportation pipe network in oil gas field can effectively reduce total investment network. Currently, based on constraints fixed station capacity star-tree topology, hierarchical strategies are often used to optimize layout. Aiming at overall ground network, this paper constructs a special mixed-integer linear programming (MILP) mathematical model considering allocation problem, which simultaneously obtain optimal connection...

With the development of natural gas industry, contradiction between upstream sources' supply and downstream consumers' demand has become more prominent. In order to improve reliability pipeline network, construction storage facilities (GSFs) have an inevitable trend. Considering different time scales GSFs constraint equations, this paper establishes capacity design scheduling optimization model in network system under multi-period. The GAMS modeling DICOPT solver are adopted solve models....