Definition: The term "predissolution" is a technical term in the field of geology and petroleum engineering. It refers to the process by which oil, gas, or other fluids are extracted from a reservoir before they become fully developed and ready for production. In general, predissolution occurs when the reservoir contains an adequate amount of fluid that has not yet been fully developed. This condition is known as "predissolved" or "pre-accumulated." The fluid may be present in the form