Experimental Measurements of the Solubility of Hydrocarbons in Compressed Natural Gas Under Pressure (10 – 100 MPa) and Temperature (50 – 150°C).

1983 ◽  
Vol 22 ◽  
Author(s):  
E. Nogaret ◽  
R. Tufeu ◽  
B. Le Neindre
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Natural Gas ◽  
Gas Phase ◽  
Oil And Gas ◽  
Experimental Measurements ◽  
Compressed Natural Gas ◽  
Oil And Gas Fields ◽  
High Pressure High Temperature ◽  
Gas Fields

ABSTRACTAn apparatus to measure phase equilibria under pressure is described. The composition of the gas phase was determined using a high pressure, high temperature sampling cell. We have found that compressed natural gas is a very good solvent of hydrocarbons. A possible application of this study is the understanding of processes which lead to migration of oil and the location of oil and gas fields.

Combination Application Strategy of Non-Metal Compound Pipe and its Verification

2019 ◽  
Vol 944 ◽  
pp. 873-880
Author(s):  
Yong Qiang Zhang ◽  
Li Liu ◽  
Zhi Gang Yang ◽  
Chuan Ta
Keyword(s):  
High Pressure ◽  
Oil And Gas ◽  
Steel Pipeline ◽  
Combined Application ◽  
Oil And Gas Fields ◽  
Composite Pipe ◽  
Pressure Transmission ◽  
Corrosion Problem ◽  
Gas Fields ◽  
Pipeline Corrosion

The service environment of Yanchang oilfield was researched. The corrosion environment of the oil and gas area of Yanchang group is different, the summer rainstorm is frequent and the landslide debris flow is easy to occur. The theoretical analysis and pilot test of pipeline performance have been carried out. We suggest that the steel pipeline, t FRP pipeline and the flexible composite pipe for high pressure transmission can be used in Yanchang group. The combined application strategy of steel pipeline, FRP pipeline and flexible composite pipe for high pressure transmission was proposed and verified. The results show that the combined application strategy effectively slows down the pipeline corrosion problem, reduces pipeline leakage accidents caused by accidental landslides, and reduces environmental pollution accidents caused by accidents such as pipeline corrosion and leakage. The tracking and analysis of pipeline combined application strategy for up to 5 years, the results show that the pipeline combined application strategy is more economical. It is concluded that the combined application strategy of steel pipelines, FRP pipelines and Flexible Composite Pipe for High Pressure Transmissions can ensure smooth operation of pipelines and save costs in the development of oil and gas fields, and it is recommended to popularize.

Stress Conversion Coefficients of Loads Crucial to Well Bore Safety

2012 ◽  
Vol 622-623 ◽  
pp. 1606-1610
Author(s):  
Bao Kui Gao ◽  
Xuan Zhuo Han ◽  
Hong Qiang Zhang
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Oil And Gas ◽  
Well Bore ◽  
Oil And Gas Development ◽  
Stress Increase ◽  
High Pressure High Temperature ◽  
Key Points ◽  
Conversion Coefficients ◽  
Cement Sheath

During oil and gas development, high pressure, high temperature and non-uniform earth stress increase the complexity of stresses in well bore which is composed of casing, cement sheath and formation. In order to obtain well bore stresses in hostile conditions, a new model is established with cement sheath and formation are treated as different materials. To predict well bore stresses rapidly, stress conversion coefficients are obtained that may change loads into stresses at key points conveniently.

scholarly journals Improved High-Pressure, High-Temperature (HPHT) Materials Qualification using Dissolved H<sub>2</sub>S Concentration as the Sour Service Scalable Metric

CORROSION ◽  
10.5006/3867 ◽  
2021 ◽  
Author(s):  
BRENT SHERAR ◽  
Peter Ellis II ◽  
Jing Ning
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Gas Phase ◽  
Stress Cracking ◽  
High Pressure High Temperature ◽  
Sulfide Stress ◽  
Sulfide Stress Cracking ◽  
Sour Service ◽  
The Relationship ◽  
Severity Parameter

Gas phase H&lt;sub&gt;2&lt;/sub&gt;S partial pressure (P&lt;sub&gt;H2S&lt;/sub&gt;) is associated with sulfide stress cracking (SSC) and is routinely used as the ‘scalable’ parameter to qualify materials for high-pressure, high-temperature (HPHT) wells. Candidate materials for HPHT wells routinely require ANSI/NACE MR0175/ISO 15156 compliance because a few mole ppm of H&lt;sub&gt;2&lt;/sub&gt;S at high pressure may place the well beyond the 0.05 psia (0.3 kPa) sour service threshold. P&lt;sub&gt;H2S&lt;/sub&gt; has been accepted historically as the scalable sour severity parameter. However, as the total pressure increases, the relationship between P&lt;sub&gt;H2S&lt;/sub&gt; and the dissolved H&lt;sub&gt;2&lt;/sub&gt;S concentration becomes non-linear. This limits the robustness of P&lt;sub&gt;H2S&lt;/sub&gt; as the sour severity metric. Thus, ISO 15156-1:2020 now permits the use of H2S fugacity (f&lt;sub&gt;H2S&lt;/sub&gt;), H&lt;sub&gt;2&lt;/sub&gt;S activity (a&lt;sub&gt;H2S&lt;/sub&gt;), and H&lt;sub&gt;2&lt;/sub&gt;S aqueous concentration (C&lt;sub&gt;H2S&lt;/sub&gt;) as alternatives for sour testing. This recent revision is based on evidence that f&lt;sub&gt;H2S&lt;/sub&gt; and C&lt;sub&gt;H2S&lt;/sub&gt; each provide better correlations to SSC at elevated total pressures than P&lt;sub&gt;H2S&lt;/sub&gt;. This paper will address the merits and challenges of using f&lt;sub&gt;H2S&lt;/sub&gt; or C&lt;sub&gt;H2S&lt;/sub&gt; to define sour severity: We argue that C&lt;sub&gt;H2S&lt;/sub&gt; is a practical, experimentally verifiable approach, which can be used to validate ionic-equation of state (EOS) frameworks used to characterize mildly sour HPHT environments.

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