![]() ![]() ![]() The drop tube helps ensure that the electronic water level tape or datalogger doesn’t get caught up in the wires for the submersible pump, or set off from water cascading into the well in open bedrock holes. Water levels are most accurately measured in the well using an electronic water level meter / tape, or datalogger lowered inside of a temporarily installed one-inch (1”) or two-inch (2”) PVC tube with a slotted well screen at its base, referred to as a “drop tube.” The drop tube, as shown in the photo, typically terminates at a depth lower than the depth that the water will be drawn down, which is commonly close to the top of the pump. The main point is that the pumping rate remains constant throughout the well yield test. The constant rate can be regulated in a number of ways, from measuring and timing a specific volume of the pumped ground water into a pail, to using an in-line flow meter. This activity can be performed by a Class 1 or 4 Licensed Well Technician. Table 1: Well Yield Testing Table from Water Well Record.Īccording to the Wells Regulation, the well must be pumped for a minimum period of one hour using a pump that has been installed in the well, while maintaining a constant pumping rate. The content for this paper comes from a course for Certified Well Technicians offered by Fleming College referred to as Continuing Education Course GEOL 69, Well Logging and Testing Fundamentals, and presents two methods to assist well technicians when completing the boxes in the Well Record form relating to the Recommended pump rate and Well Production sections. Another reason is related to the level of experience, expertise and training received by the well technician over their career. For example, due to more recent privacy policies, well owner names are no longer made available to the public. Water well records date back to the early 1900s and over the past 100 years, the information contained in the water well records has varied considerably, for various reasons. This source of “big data” contains information about the location, type of well, depth, construction materials/drilling method, geologic materials encountered, driller’s (well contractor and technician) name, water quality, response to pumping and estimated yield of the individual well that is recorded. SPE-101872-MS.In order to provide assistance to well technicians completing the well record for a domestic well, this article presents a practical approach for the analysis of the results of well yield testing data collected as part of the well construction activities of a domestic well.Īccording to the Ontario Ministry of Environment, Conservation and Parks (MECP), there are roughly 780,000 water well records in the publicly available digital water well record database. Presented at the SPE Asia Pacific Oil & Gas Conference and Exhibition, Adelaide, Australia, 11–13 September 2006. Well Test by Design: Transient Modelling to Predicting Behaviour in Extreme Wells. Teng, D.T., Maloney, B.J., and Mantecon, J.C. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, 27–30 September. New Exact Spherical Flow Solution With Storage and Skin for Early-Time Interpretation With Applications to Wireline Formation and Early-Evaluation Drillstem Testing. Įhlig-Economides CA, Hegeman P, Vik S (1994) Guidelines simplify well test analysis. Pressure Transient Analysis in an Elongated Linear Flow System. Presented at the International Meeting on Petroleum Engineering, Beijing, 14–17 November. Bilinear Flow Regime Occurring in Horizontal Wells and Other Geological Models. Presented at the SPE Annual Fall Technical Conference and Exhibition, New Orleans, 3–6 October. Unsteady-State Flow Behaviour for a Well Near a Natural Fracture. Ĭinco-Ley, H., Samaniego-V., F., and Dominguez-A., N. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 4–7 October. Transient Pressure Analysis: Finite Conductivity Fracture Versus Damaged Fracture Case. Samaniego-V., 1981, Transient pressure analysis for fractured wells: Journal of Petroleum Technology, v. Unsteady Spherical Flow in Petroleum Reservoirs. Response of Wells Producing Layered Reservoirs: Unequal Fracture Length. Camacho-V., R.G., Raghavan, R., and Reynolds, A.C. ![]()
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