Breaking of Emulsions Using Locally Formulated Demusifiers
- D. Emuchay (University of Port Harcourt) | M.O. Onyekonwu (University of Port Harcourt) | N.A. Ogolo (University of Port Harcourt) | C. Ubani (University of Port Harcourt)
- Document ID
- Society of Petroleum Engineers
- SPE Nigeria Annual International Conference and Exhibition, 5-7 August, Lagos, Nigeria
- Publication Date
- Document Type
- Conference Paper
- 2013. Society of Petroleum Engineers
- 4.1.2 Separation and Treating, 1.6 Drilling Operations, 1.14 Casing and Cementing, 4.1.5 Processing Equipment, 2.2.2 Perforating, 2.5.2 Fracturing Materials (Fluids, Proppant)
- 3 in the last 30 days
- 393 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 8.50|
|SPE Non-Member Price:||USD 25.00|
Crude oil emulsion has been one of the paramount challenges facing oil and gas production from the subsurface (reservoir) to the surface. Since there is a likely hood of producing water alongside crude oil because of the environment in which hydrocarbons (Petroleum) are found, this research attempts to find a solution to the lingering problem of treating crude oil emulsion with locally formulated demulsifiers. Materials used in the formulation of the local blends include coconut oil, D-Limonene, Liquid soap, locally prepared starch, Camphor, Calcium Hydroxide, Paraffin wax. Five different concentrations were blended and tested on a crude oil emulsion from a Niger Delta field and was treated with locally made demulsifiers at a temperature of 40oC which is the lease temperature.
Test results indicate that all blends spontaneously dissolve the crude oil emulsion within the shortest possible time with a clean top oil of almost 100% with less than 1% sediment. A control experiment revealed that the crude oil emulsion undisolved within the stipulated time of 30mins to 120mins. It was observed that the same amount of a foreign demulsifier which is already in use did not give the same results within the stipulated time but gave close results after a longer duration of time. The demulsifiers were composed of flocculants, surfactants and solvents..
The most important objective of any oil production facility is the separation of water and other foreign materials from produced crude. Emulsion is a heterogeneous mixture that consists of at least one immiscible liquid intimately dispersed in another in the form of droplets, making it difficult to separate pure clean crude from the emulsion. Crude oil emulsions are undesired because breaking the emulsion, thereby separating the crude from the emulsions is a challenge in today's oil producing industry.
During the productive life of an oil field, a stage is reached when water will be co-produced in unacceptable quantities with hydrocarbons. This water which co-exists with the hydrocarbon in reservoirs gradually infiltrates into the hydrocarbon production region of the formation. Eventually water becomes part of the production regardless of the method of recovery. Sometimes water is produced early in the life of a field. Some wells drilled at higher levels in reservoirs still produce water later. Sometimes the amount of water produced is controlled by plugging back the lower part of the well bore with cement and perforating intervals high up in formations. This can at least delay water encroachment for a time. Secondary or tertiary recovery methods are another cause of water encroachment.
|File Size||186 KB||Number of Pages||10|