SU720142A1 - Method of treating salt seams by underground dissolving - Google Patents

Description

I

The invention relates to mining and can be used in the extraction of brines by underground dissolution of salt deposits through wells.

There is a known method of mining salt reservoirs by underground dissolution, including drilling vertical and inclined horizontal wells, pumping the reservoir through the inclined horizontal well and pumping out the formed brine through the vertical well 13 The disadvantage of this method is the unevenness and incompleteness of the salt reservoir mining, as well as insufficient production intensity.

There is a known method of mining salt formations by underground dissolution, which includes drilling vertical and inclined horizontal wells, connecting them by means of fracturing a salt formation, pumping a solvent into a specified formation through an inclined horizontal well, and removing the formed brine through vertical sludge 2l.

The disadvantage of this method is insufficient intensity of the mining process.

The purpose of the invention is to eliminate this drawback.

The goal is achieved by the fact that on the bottom of an inclined horizontal, the wells additionally drill the main pumping well, the vertical wells have two rows of dgami on either side of the inclined horizontal well, pumping out the brines through the main pumping well, and vertical wells - by their consecutive commissioning in the direction from the lateral horizontal well to the main pumping well.

FIG. Figure 1 shows a production unit that is processed in this way; in fig. 2 is a section aa and NP fig .. 1,

The method is carried out in a manner.

37

Eu ilkloiiio gort1zptstplyuyu well 1gu, sub-saline layer 2 at its heading. Then, at the bottom of the hole, an inclined portional well of a 1 t drill is t), a cyclical oyuvny pumping skguzzhi} gu

3 and begin the process of mining the salt reservoir 2. At the same time, the solvent is pumped into the well 1 and the brine formed is pumped out through the main pumping well 3. Then

both sides of the obliquely horizontal well 1, the vortical wells 4 are drilled into two 11alll rows of wells with a deep bed in the underlying bed 2 rocks 5 and planted them,

The wells 4 are connected with an inclined horizontal well 1 by fracturing the salt reservoir 2. The interval 6 for fracturing production is separated in the lower part of the salt reservoir 2. To do this, the casing strap was installed above the contact of the salt reservoir 2 and its structural properties 5 and cement the column.

The fracturing is carried out by nagging the solvent in the borehole 4 until the fracture forming intersects with the borehole of the borehole 1 and it reaches the sufficient section of the slurry sufficient to extract the brine.

In the course of further development, brine is pumped out from both the main pumping well 3 and from the vertical wells 4, which are successively put into operation in the direction from the inclined horizontal CKEW of engine 1 to the main pumping well 3. subflow of solvent into different points of the deposit, thus achieving its systematic development.

If there are several layers located one above the other after completion of mining the lower layer, the transition to treatment of the overlying layers. At the same time, the solvent is fed to vertical wells 4, first to the wells 3 furthest from the main pumping well, through which the wells are led 24

at rPSSALL, l ZLTOM GKKCCHCHUYNO GK.RRMS- pshyut LPDLCHU 11STPORIT; LYA, SLOIII

to OSIPOVNOY, ogkak pi, pzhiyo 3.

All of the ile of the IifOHonouHT iifjH noNfoiiiH H1rg () ora | 1ii skvpzhi casing strings) 4 or ppatt them to work on the OP (-aAl € LAC1 (THEIR SALT-PLLSP-L 11ROG) -: STKOG5

insoluble sills

This method allows | D) to be the objective (p1PO; fully and with sufficient intensity to reflect the rational use of illusion.

Formula l i; i about brpo t 1.} and li

The method of removal of salt X ii.nacTOf by underground dissolution, including drilling vertical and horizontal directional wells, connecting them by guiding the formation, pumping the specified reservoir of solvent through an inclined horizontal well and pumping out the saline through a vertical well, then According to the TeMf, from the intensification of the drilling process, an additional hole was drilled at the bottom of an inclined Horizontal well, ocHOBifyrci a hole, vertically} {two wells have two holes. both sides of an inclined horizontal well, pumping brines through ocuoBiiyK) otgtmny well carried out in the tg. - {on: from the whole period of the reservoir development, lh (-into the vertical wellbore - by putting them into operation in the direction from the injection iaclon o 1: horizontal to see the main well bore

Sources shgformshpsh.

taken into account during the experiment

1 “Kalabin L, I. Mineral fossils of underground deposits, MOS Atomizddt, 106 p. 64-4) 5.

2. Bogdanog, Yu. A., and so forth. F.:aitlfgaliiyoy OS industry-zorchn; n formation. Seri Ipgensge pggitsi nrxj process of the underground in the EE 1pls.pchkvani sop-ing deposits ,. L ,, 197О, BYP „2 p. 46-57 (prototnp).

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A-A

Claims (1)

Formula l 3 A method of mining salt formations by underground dissolution, including drilling vertical and inclined horizontal wells, their connection? by hydraulic fracturing of the salt formation, the solvent is injected into the specified layer through an inclined horizontal well and pumping out the formed brine through vertical wells, which consists in that, in order to intensify the development process, the main pumping well is additionally drilled to the bottom of the inclined horizontal well, vertical wells are located in two rows. both sides of the inclined horizontal well, brines are pumped out through the main pumped out well during the exact period of formation development, and through vertical wells - after they are commissioned in the direction from the injected inclined horizontal well to the main drilling well.