CN113482591A - Offshore oilfield block well site combined investigation method - Google Patents
Offshore oilfield block well site combined investigation method Download PDFInfo
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- CN113482591A CN113482591A CN202110447799.9A CN202110447799A CN113482591A CN 113482591 A CN113482591 A CN 113482591A CN 202110447799 A CN202110447799 A CN 202110447799A CN 113482591 A CN113482591 A CN 113482591A
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- 238000011835 investigation Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 18
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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Abstract
The invention provides a block well site combined investigation method for an offshore oil field, which comprises the steps of connecting two well sites to form a straight line l, and finding a midpoint p of the line segment; taking the point p as a midpoint to make a line segment ab which is perpendicular to the length l and is 2 km; extending the straight line l to a length of 2km by taking the point p as a midpoint to be a line segment cd; respectively taking four ABCD points as midpoints, making four line segments which are parallel to the line segment ab and are perpendicular to the line segment ab, wherein the four line segments are intersected at the four ABCD points, and forming an area ABCD; the area ABCD is the survey area of the wellsite at two well sites. According to the method, survey line arrangement and survey area of well site survey are re-planned, an optimal survey line arrangement scheme is designed on the premise that the survey area and workload do not exceed the total survey area, the conventional single well site engineering geophysical prospecting and engineering geological acquisition operation time is changed into multi-well site comprehensive combined survey, and the well site survey operation efficiency is improved.
Description
Technical Field
The invention relates to the technical field of engineering geophysical prospecting and engineering geophysical prospecting survey standardizing methods, in particular to an offshore oilfield block well site combined survey method.
Background
With the enhancement of the exploration and development strength of the Bohai sea area, the number of drilling well positions rises linearly, and a larger geological reserve is found. About 20 exploration wells are often arranged in the same block of an oil field in a certain area at one time, and the well spacing of partial wells is only hundreds of meters. The conventional investigation method is to establish an investigation range of 2km × 2km centering on a well position, and 17 survey lines in the 0 °/180 ° direction and 13 survey lines in the 90 °/270 ° direction are arranged therein. The well site investigation workload is very large, the line-running repetition rate is high, and great time waste and cost waste are caused.
Disclosure of Invention
The invention overcomes the defects in the prior art, the existing well site investigation workload is large, the line-running repetition rate is high, and the time and the cost are wasted, and provides the offshore oil field block well site combined investigation method.
The purpose of the invention is realized by the following technical scheme.
An offshore oilfield block well site combined investigation method comprises the following steps:
when there are only two well sites:
step 1, connecting two well sites to form a straight line l, and finding a midpoint p of a line segment;
step 2, taking the point p as a midpoint to make a line segment ab which is perpendicular to the length l and is 2 km;
step 3, extending the straight line l to a line segment cd with the length of 2km by taking the point p as a midpoint
and 5, obtaining the area ABCD obtained in the step 4, namely the well site investigation range when two well sites exist.
When there are more than two well sites:
step 1, finding out a concentrated area of a well site, and dividing the concentrated area into a combined investigation range;
step 2, sequentially connecting peripheral well sites in the combined investigation range into a closed geometric figure;
and 3, connecting two points with the farthest distance in the closed geometric figure obtained in the step 2, and extending the two points in the opposite directions by 200m respectively to obtain a straight line L1The distance between the two well positions at the outermost edge and the edge of the scanning range is more than 200m, so that the scanning precision is ensured;
step 5, respectively translating the straight lines L1And passing through E, F to obtain a straight line AB and a straight line CD, connecting A, D and B, C to obtain a straight line AD and a straight line BC, and forming an area ABCD, wherein the investigation area is ABCD.
The invention has the beneficial effects that: the method replans the survey line arrangement and survey area of the well site survey, designs an optimal survey line arrangement scheme on the premise that the survey area and the workload do not exceed the total survey area, changes the previous single well site engineering geophysical prospecting and engineering geological acquisition operation time into multi-well site comprehensive combined survey, and improves the well site survey operation efficiency
Drawings
FIG. 1 is a wellsite survey area determination method when there are two well sites;
FIG. 2 is a wellsite survey area determination method when the number of well sites is two or more.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example one
As shown in fig. 1, a method for joint investigation of offshore oilfield block and wellsite comprises the following steps:
when there are only two well sites:
step 1, connecting two well sites to form a straight line l, and finding a midpoint p of a line segment;
step 2, taking the point p as a midpoint to make a line segment ab which is perpendicular to the length l and is 2 km;
step 3, extending the straight line l to a line segment cd with the length of 2km by taking the point p as a midpoint
and 5, obtaining the area ABCD obtained in the step 4, namely the well site investigation range when two well sites exist.
Example two
As shown in fig. 2, a method for joint investigation of offshore oilfield block and wellsite comprises the following steps:
when there are more than two well sites:
step 1, finding out a concentrated area of a well site, and dividing the concentrated area into a combined investigation range;
step 2, sequentially connecting peripheral well sites in the combined investigation range into a closed geometric figure;
and 3, connecting two points with the farthest distance in the closed geometric figure obtained in the step 2, and extending the two points in the opposite directions by 200m respectively to obtain a straight line L1The distance between the two well positions at the outermost edge and the edge of the scanning range is more than 200m, so that the scanning precision is ensured;
step 5, respectively translating the straight lines L1And passing through E, F to obtain a straight line AB and a straight line CD, connecting A, D and B, C to obtain a straight line AD and a straight line BC, and forming an area ABCD, wherein the investigation area is ABCD.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (2)
1. An offshore oilfield block well site combined investigation method is characterized in that: the method comprises the following steps:
when there are only two well sites:
step 1, connecting two well sites to form a straight line l, and finding a midpoint p of a line segment;
step 2, taking the point p as a midpoint to make a line segment ab which is perpendicular to the length l and is 2 km;
step 3, extending the straight line l to a line segment cd with the length of 2km by taking the point p as a midpoint
Step 4, respectively taking four ABCD points as midpoints, making four line segments which are parallel to the line segment ab and perpendicular to the line segment ab and are 2km in length, and intersecting the four line segments at the four ABCD points to form an area ABCD;
and 5, obtaining the area ABCD obtained in the step 4, namely the well site investigation range when two well sites exist.
2. An offshore oilfield block well site combined investigation method is characterized in that: the method comprises the following steps:
when there are more than two well sites:
step 1, finding out a concentrated area of a well site, and dividing the concentrated area into a combined investigation range;
step 2, sequentially connecting peripheral well sites in the combined investigation range into a closed geometric figure;
and 3, connecting two points with the farthest distance in the closed geometric figure obtained in the step 2, and extending the two points in the opposite directions by 200m respectively to obtain a straight line L1The distance between the two well positions at the outermost edge and the edge of the scanning range is more than 200m, so that the scanning precision is ensured;
step 4, finding out the connecting line between two well positions and L1Two well points closest to the vertical, through which straight lines L are respectively drawn1After the vertical lines are respectively extended by 200m in the opposite direction, determining to obtain two end points E, F, and determining that the distance between the two end points E, F and the most marginal well position is more than 200m from the edge of the scanning range, thereby ensuring the scanning precision;
step 5, respectively translating the straight lines L1And passing through E, F to obtain a straight line AB and a straight line CD, connecting A, D and B, C to obtain a straight line AD and a straight line BC, and forming an area ABCD, wherein the investigation area is ABCD.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110447799.9A CN113482591A (en) | 2021-04-25 | 2021-04-25 | Offshore oilfield block well site combined investigation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110447799.9A CN113482591A (en) | 2021-04-25 | 2021-04-25 | Offshore oilfield block well site combined investigation method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002235665B2 (en) * | 2001-03-09 | 2007-04-05 | Ronald Stephen Fleming | Marine seismic surveys |
| US20160313466A1 (en) * | 2015-04-27 | 2016-10-27 | Cgg Services Sa | Three-dimensional seismic acquisition system and method with dynamic resolution |
| CN109031462A (en) * | 2017-06-08 | 2018-12-18 | 道达尔公司 | Method for assessing the geophysical reconnaissance acquisition geometry on interested region |
| CN109345082A (en) * | 2018-09-07 | 2019-02-15 | 中国石油集团川庆钻探工程有限公司 | Well location surveys quantification numerical value screening and evaluating system |
-
2021
- 2021-04-25 CN CN202110447799.9A patent/CN113482591A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002235665B2 (en) * | 2001-03-09 | 2007-04-05 | Ronald Stephen Fleming | Marine seismic surveys |
| US20160313466A1 (en) * | 2015-04-27 | 2016-10-27 | Cgg Services Sa | Three-dimensional seismic acquisition system and method with dynamic resolution |
| CN109031462A (en) * | 2017-06-08 | 2018-12-18 | 道达尔公司 | Method for assessing the geophysical reconnaissance acquisition geometry on interested region |
| CN109345082A (en) * | 2018-09-07 | 2019-02-15 | 中国石油集团川庆钻探工程有限公司 | Well location surveys quantification numerical value screening and evaluating system |
Non-Patent Citations (2)
| Title |
|---|
| 田春和;: "滩海井场调查中区块物探资料的比对分析", 港工技术, no. 1 * |
| 陶林;刘小刚;: "区域井场调查技术在渤海湾的应用和发展", 石油科技论坛, no. 05, pages 70 - 72 * |
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Application publication date: 20211008 |